For most items there is no minimum order quantity on our website — you can order a single part or several hundred units. For bulk and wholesale orders, we offer dedicated B2B pricing based on quantity, model selection, and shipping route. To request a custom quote, use ourBulk Orders / Request a Quotepage, or contact us directly atcontact@lys-sz.com or on WhatsApp at+86 182 1872 0281. Our team typically responds within a few hours.

We accept all major credit and debit cards (Visa, Mastercard, JCB, Discover, Diners Club, UnionPay), digital wallets (Apple Pay, Google Pay), Bitcoin, USDT and T/T USD bank wire transfer for professional and bulk orders. If your country is not listed at checkout, or if you prefer to pay outside the website (T/T wire, alternative method), contact us at contact@lys-sz.comand we will issue a manual invoice and arrange the transfer.

Yes — we ship worldwide from our Shenzhen warehouse via DHL, FedEx, UPS, and EMS, with typical delivery times of 3–10 business days depending on destination. By default, shipments are sent DAP (Delivered At Place), which means the buyer is responsible for any local import duties, VAT, or customs clearance fees applied by their country. For customers in the United States and the European Union, we offer DDP (Delivered Duty Paid) as an option — we handle all duties and customs clearance, so your order arrives at your door with no extra charges, no customs paperwork, and no surprise fees. DDP availability is also possible on a few other lanes depending on order size and routing. To activate DDP on your order or check availability for your country, contact us at contact@lys-sz.com before placing your order so we can quote the all-in landed cost.

Yes. Every product we ship is QC-tested before dispatch. If an item arrives defective or does not match the description, contact us at contact@lys-sz.com with your order number, a description of the issue, and photos or a short video — we will work with you on a replacement or appropriate remedy, in line with ourRefund Policy. For technical questions before purchase (compatibility with your miner model, part numbers, electrical specifications, fitment), our team can share datasheets and detailed guidance via email or WhatsApp — just reach out.

For OEM / private-label orders, custom packaging, or branded inserts, we can typically accommodate above certain volumes — contact us with your project details, target quantities, and timeline so we can scope it together. For dropshipping, we work case-by-case with established resellers and repair shops. To discuss your model, expected volume, and routing, send us a message at contact@lys-sz.com or via WhatsApp.