FAQ

Q: Will my miner be held or confiscated by customs?

A: No. We provide 100% Insured DDP Shipping. We utilize premium DDP (Delivered Duty Paid) channels to cover all Customs Duties and VAT for your miner. If customs holds your package, we will arrange a replacement shipment as quickly as possible at zero additional cost to you.

Q: How long does delivery take?

A: We use premium fast express couriers. International delivery typically takes 5-10 business days after dispatch. Please allow an additional 1-2 business days for mandatory pre-shipment quality verification and configuration before your order ships.

Q: What does DDP mean? How does it protect me?

A: DDP stands for Delivered Duty Paid. It means we cover all import duties, customs taxes, and VAT on your behalf. When your package arrives, you owe nothing extra. No surprise bills, no customs agents calling you, no delays at the border. What you see at checkout is exactly what you pay — total.

Q: Which countries receive full DDP (duty-paid) shipping?

A: We currently offer 100% Insured DDP Shipping to:

USA | Canada | UK | Europe (EU) | Australia
Taiwan | Japan | South Korea | Indonesia | India
Mexico | Middle East (UAE, Kuwait & more)

For countries not listed, delivery is shipped DAP (Duties at Destination). Contact us before ordering if you are unsure about your country.

Q: I am in Japan or South Korea. Do I need to pay consumption tax?

A: No extra payment required from you. For Japan and South Korea, local consumption tax (JCT 10% / VAT 10%) and shipping insurance are already fully included in the shipping fee shown at checkout. No hidden charges or surprises upon delivery.

Q: I am in Taiwan. What is EZ WAY and do I need it?

A: Yes. Taiwan Customs requires overseas purchases to be declared using the EZ WAY App (易利委) for personal import clearance. Please download the EZ WAY App and register with your Taiwan ID before your order arrives. This is a Taiwan government requirement. If you need assistance, please contact our support team.

Q: I am in Brazil or Latin America. What is CPF/CNPJ?

A: Brazilian customs requires your CPF (individual taxpayer ID) or CNPJ (company taxpayer ID) for all international imports. Please provide your CPF/CNPJ when placing your order so customs clearance proceeds smoothly. Without it, your package may be held at customs. Please note: Brazil and most Latin American countries (excluding Mexico) ship via DAP — local import taxes are not pre-covered.

Q: What happens if my miner is damaged during shipping?

A: Every shipment includes full transit insurance. If your miner arrives damaged, please photograph and video the damage within 7 days of delivery and contact support@calvinrig.com. Standard & Premium units qualify for free return shipping within this 7-day window; Diamond units are covered under your full 180-Day Replacement Guarantee. See our Refund Policy for full details. Do not discard the original packaging as it may be needed for the claim process.

Q: Does my delivery require a signature upon receipt?

A: Your parcel will be delivered without a signature requirement. Please ensure someone is available at the time of delivery, or leave a note in your order specifying a safe drop-off location. Please note that once the carrier marks your order as delivered, responsibility for the package transfers to the recipient. Calvin Rig Technology is not liable for parcels reported missing after confirmed delivery.

Q: ⚡ Save Up to 8.5% on Your Mini Miner via Crypto.com Pay!

A: We are a crypto-native store. When you check out using Crypto.com Pay, you can stack your rewards to save up to 8.5% in total:

• Instant Store Discount (6% Off): Use discount code PAYWITHCRYPTO during checkout for an immediate 6% price deduction.
• Crypto.com Checkout Rewards (Up to 2.5% Back): Earn CRO tokens back directly to your Crypto.com App — this reward is issued by Crypto.com's own platform, not by us:
- Tier 1 (2.5% CRO Rebate): Valid for users staking 10,000 CRO or more.
- Tier 2 (1.25% CRO Rebate): Valid for all standard or new Crypto.com App users.

Checkout rebates are fully funded and distributed directly by Crypto.com. This store does not charge any crypto handling fees.

Q: What payment methods do you accept?

A: We accept a wide range of payment methods:

• Visa / Mastercard /American Express / UnionPay — secure card checkout
• PayPal — including Guest Checkout (Visa/Mastercard without a PayPal account)
• Crypto.com Pay — Bitcoin, ETH, USDC, Litecoin and Dogecoin
• USDT (TRC20) / USDC (Polygon) — Manual cryptocurrency transfer, 6% off with code PAYWITHCRYPTO
• Local Bank Transfer — USD, GBP, EUR (SEPA countries only), 6% off with code PAYWITHBANK
• FPS (Faster Payment System) — Hong Kong bank transfer (HKD), 6% off with code PAYWITHFPS
• AlipayHK — Via Antom Payments
• Local Digital Wallets — Mercado Pago, BillEase, Boost, EPS, Bancontact, Touch'n Go eWallet, BANCOMAT Pay, K PLUS, JKOPay, PayU, Bank of Ayudhya, LINE Pay, Kredivo, BLIK, BPI, GCash, PayNow, iDEAL and more via Antom

Q: How do I pay with USDT (TRC20)?

A: Follow these steps:

1. Add your item to cart and proceed to checkout
2. Select 「USDT (TRC20) Cryptocurrency Transfer」 as your payment method
3. Complete your order — you will receive our USDT wallet address in your order confirmation
4. Send the exact USDT amount to our TRC20 wallet address
5. Email a screenshot of your transaction to support@calvinrig.com with your order number
6. We will confirm payment and begin processing within 1 business day

Use code PAYWITHCRYPTO for 6% off when paying with USDT.

Q: Can I use multiple discount codes on the same order?

A: Only one store discount code can be applied per order. However, you can stack the PAYWITHCRYPTO store discount (6% off) with the Crypto.com Pay cashback (up to 2.5% CRO back), since the cashback is issued directly by Crypto.com — giving you a combined saving of up to 8.5%.

Q: Can I cancel my order after placing it?

A: Yes, please email to support@calvinrig.com or WhatsApp +852 9538 7305 (https://wa.me/85295387305) immediately with your order number. If your order hasn't shipped yet, we'll cancel it for you:

Paid by credit card (Visa, Master, American Express, Union Pay, Google Pay), PayPal, or another checkout payment gateway: a non-refundable processing fee (typically 2–4%, depending on your payment method) will be deducted from your refund, since payment providers do not return this fee to us.

Paid by direct bank transfer, FPS, or our dedicated crypto wallet (USDT/USDC): no fee — you'll receive a 100% refund.Once your order has shipped, cancellation is no longer possible, but you're fully covered by our Refund & Return Policy as soon as it arrives.

Q: I am a beginner. Is it hard to set up the miner?

A: Not at all! Our Premium edition (or any unit adding our Setup Optimization Service) is completely pre-configured for you — we update the firmware, fine-tune the hashrate, configure two solo mining pools, and load a wallet placeholder (simply update it to your own real address before mining). Our Diamond edition features a proprietary app for a seamless Bluetooth setup completed by you in minutes after arrival. Every purchase also includes access to our real-human technical support team.

Q: What is the difference between Standard, Premium, and Diamond editions?

A: All editions go through the same rigorous pre-shipment testing.

🔹 Standard (DIY Setup) — 3-Month Warranty. You configure the firmware, wallet address, and mining pool yourself. Best for experienced users.

👑 Premium (Plug & Play) — 3-Month Warranty, same as Standard. We pre-configure everything: firmware, your wallet placeholder, two solo mining pools, and hashrate fine-tuning. Plug in, connect WiFi, drop in your own wallet address, and you're mining.

💎 Diamond (180-Day Local Replacement) — Our flagship tier with the strongest protection. If your unit develops a genuine fault within 180 days, we replace it entirely instead of repairing it — no waiting for parts. Setup is completed by you upon arrival via a proprietary Bluetooth app.

Diamond editions are currently available on select flagship models. See our Warranty & Service Centers page for the full list of eligible models. For beginners, we recommend Premium or Diamond.

Q: What is Solo Mining? How is it different from Pool Mining?

A:

Pool Mining — You combine hashrate with thousands of miners and receive small, frequent rewards proportional to your contribution.

Solo Mining — You mine independently. If your miner finds a block, you receive the full Bitcoin block reward (~3.125 BTC). Think of it as a lottery where your ticket never expires and you mine 24/7.

Our miners are designed for Solo Mining, fully supporting CKPool — one of the most popular solo Bitcoin mining pools.

Q: How much electricity does a mini miner use per day?

A: Approximate daily power consumption by model:

• Bitaxe Gamma 601 (1.2TH) — ~17W → ~0.41 kWh/day
• Avalon Nano 3S (6-6.3TH) — ~140W → ~3.36 kWh/day
• NerdOCTAxe Rev3.1 (12TH) — ~200W → ~4.8 kWh/day

Our home miners are designed for low power consumption — far less than most household appliances.

Q: What internet connection do I need?

A: Very little. Our miners connect via WiFi and use minimal bandwidth — less than a smartphone checking email. Any standard home broadband (even 10 Mbps) is more than sufficient. A stable, uninterrupted connection matters more than speed. We do not recommend using VPNs while mining as they can cause pool connectivity issues.

Q: How long until I find my first Bitcoin block?

A: Solo mining is probabilistic — there is no guaranteed timeline. Members of our community have found blocks within days; others mine for months. Check our Community Wins page for real verified block finds from our customers, and use our Solo Mining Calculator to estimate your personal odds based on your hashrate.

Q: Can I monitor my miner remotely?

A: Yes! Our Diamond editions include remote monitoring — check your miner's hashrate, uptime, and pool status from your smartphone anytime, anywhere. You can also remotely change pools, update your wallet address, and set scheduled on/off times. You will receive instant alerts if your miner goes offline or drops hashrate. See our 24/7 App Monitor page for details.

Q: What is your repair and warranty policy?

A: All editions include a 3-Month Local Warranty (USA, Germany, HK) as standard — no shipping back to Asia. Within the first 7 days of delivery, confirmed DOA claims on Standard/Premium units also qualify for free return shipping. Select flagship models also offer our Diamond upgrade: 180-Day Local Unit Replacement (USA, Dubai, HK), so you never have to wait for repairs. Your warranty period always begins from your confirmed delivery date. Full details, including which models are eligible, are on our Warranty & Support page.

Q: Can I return my miner if I change my mind?

A: We accept returns within 14 days of delivery for unopened, unused units in original packaging. A 25% restocking fee applies. Pre-configured Premium units cannot be returned once opened as the configuration work has been completed specifically for you. See our full Refund Policy.

Q: How long does a refund take to process?

A: Once we receive and inspect the returned unit, refunds are processed within 5-7 business days. PayPal refunds typically arrive within 3-5 business days; cryptocurrency refunds within 1-2 business days.

Q: Who is Calvin and why should I trust this store?

A: Calvin is a former Senior Relationship Manager at a major bank who entered the Bitcoin space in 2017. He has personally solo-mined multiple blocks across different cryptocurrencies and hands-on tested over 15 miner models. Calvin runs multilingual YouTube channels (Cantonese, English, Mandarin) under the Calvin Crypto brand. Calvin Rig Technology is the official store behind Calvin Crypto.

Q: Where are you based? Are you a registered company?

A: Yes. We are a legally registered Hong Kong business:

• Company Name: CALVIN RIG TECHNOLOGY
• Business Registration No.: 41625564-000-04-26-5
• HQ & Local Service Centre: Yuen Long, Hong Kong

Being based in Hong Kong places us at the heart of the global crypto hardware supply chain. Every unit that ships under the Calvin Rig name goes through the exact configuration protocol I built and oversee myself — and is verified on video before it leaves the warehouse to help expedite any future support requests. This is all backed by our local repair/replacement warranty (USA, Germany, Dubai, HK) so you're never left waiting.

Q: Do you dropship? Or do you physically handle every unit?

A: We don't sell unverified hardware, and we don't leave quality control to chance. Every unit goes through the exact configuration protocol I built, and is verified on video before it ships to you to help expedite any future support requests. This is backed by our local repair/replacement warranty (USA, Germany, Dubai, HK). Depending on your edition, pool and wallet setup is either pre-configured using placeholders before shipping or guided step-by-step via an app right after your unit arrives — either way, you'll be hashing within minutes.

Q: How can I contact your support team?

A: We offer multiple support channels:

• Email: support@calvinrig.com (response within 24 hours)
• WhatsApp: +852 9538 7305 (Text/Voice — International & Tech Support)
• HK Local Office: +852 5976 8726
• Support Hours: Monday–Friday, 10:00 AM – 6:00 PM (HKT / GMT+8)
• Community: Join our WhatsApp Mining Community

Q: Do you have a loyalty or rewards program?

A: Yes! We run a Store Credit Rewards Program. You earn CASH REBATE 2% on every purchase, which can be redeemed for discounts on future orders. Points are also awarded for leaving a product review or referring a friend. Click the Reward button on the bottom left of our website to check your balance and available rewards.