Shipping policy

Last updated: October 19, 2026

Please review our shipping and return terms before placing an order. For assistance, email eshop-crab@realsil.com.cn.

1. Shipping Origin, Destinations & Availability

Orders are shipped from Suzhou, Jiangsu, China.

Our main shipping destinations include Hong Kong, Macao, Taiwan, South Korea, the United Kingdom, Japan, Singapore, and the United States. Available destinations and shipping methods are shown at checkout. If your destination is unavailable, please contact us before ordering.

Only in-stock products are offered for purchase. This website currently accepts retail orders only; bulk and wholesale orders are not available through the website.

2. Processing Time, Delivery & Shipping Fees

Orders are dispatched within 2 business days after payment is confirmed. We do not dispatch orders on weekends or public holidays in mainland China. Special holiday arrangements will be announced on our website.

Processing time is separate from transit time.

Estimated transit times after dispatch: After placing your order, you can track your shipment through the tracking page we provide.

Shipping is charged separately from the product price. Available methods and shipping fees are displayed at checkout. Your order will be shipped using the service selected and paid for.

Transit times are estimates and may be affected by customs clearance, carrier operations, holidays, or local delivery conditions. If we cannot dispatch an order within the stated processing time, we will notify you and explain the available options, including cancellation and a refund.

Once your order ships, we will send the tracking details by email.

Requests to combine orders or split a shipment must be confirmed with us before dispatch. Any change to the shipping arrangements or charges must be agreed in advance.

3. Customs Duties, Taxes & Clearance

International orders may be subject to import duties, VAT or other import taxes, customs clearance charges, and carrier handling fees. These costs are the buyer's responsibility unless otherwise required by applicable law.

Any taxes or import charges collected at checkout will be shown before purchase. Charges not already collected may be requested by customs or the carrier before delivery.

Please provide accurate contact details and cooperate with any customs clearance requirements.

4. Packaging & Documents

Packaging varies by product and may include a foam-lined plastic box, an antistatic bag, bubble wrap, or a corrugated product box. Products are then packed in an outer shipping carton with cushioning bubble wrap.

If you need documents showing your company name or other supporting paperwork, email eshop-crab@realsil.com.cn with your order number and specific requirements. Available scanned documents can be sent by email.

5. Delivery Problems, Damage & Missing Items

Please check your parcel and its contents promptly.

Report visible shipping damage, incorrect items, or missing items to eshop-crab@realsil.com.cn within 48 hours of the carrier marking the parcel as delivered. Sending your email within this period records your report, even if our team responds on the next working day.

Please include:

  • Your order number and tracking number.
  • Clear photos of the outer carton showing the shipping label and tracking number.
  • Photos of the products and everything received.
  • Close-up photos of any damage, where applicable.


Keep the packaging while the issue is being investigated. If the outer carton is severely crushed or damaged at delivery, refuse the parcel where possible and notify us immediately.

Late reports or insufficient evidence may prevent us from filing a carrier claim. The 48-hour reporting period does not remove any rights you have under applicable law or automatically exclude a valid product defect claim.

If a parcel has not arrived, contact us once its estimated delivery period has passed. A parcel that has not been delivered is not subject to the 48-hour period above.

6. Free Replacements

After verification, we offer a free replacement or shipment of missing items for:

  • Confirmed loss in transit: the carrier confirms that the parcel was lost.
  • Incorrect or missing items: the SKU does not match your order, or ordered items or included accessories are missing.
  • Severe transit damage: shipping damage causes physical breakage or detached components, supported by the delivery evidence described above.
  • Failure on first use: an unsoldered, physically unmodified product does not work on its first power-up, and basic troubleshooting with our technical support team confirms that the failure was not caused by incorrect operation.

Please contact us before attempting repairs or modifications.

7. Cancellations, Returns & Refunds

Cancellation before dispatch

You may request cancellation before the order leaves our warehouse and before a tracking number has been generated. Email us as soon as possible so we can check the order status.

Unopened and unused returns

Under our voluntary return policy, you may request a return within 7 calendar days of delivery, provided that the product remains in its original, intact packaging.

  • Has an unopened antistatic bag, where supplied.
  • Has not been powered on, soldered, used, or physically modified.
  • Remains suitable for resale.

Return shipping for a personal-preference return is paid by the buyer. This voluntary policy is subject to the statutory rights described below.

Confirmed manufacturing defects

If troubleshooting confirms a manufacturing defect and you do not accept a replacement, you may request to return the affected product for a full refund.

Return procedure

Contact eshop-crab@realsil.com.cn with your order number, reason for return, and supporting evidence where relevant. Please obtain our return instructions before sending the product.

Return shipping for confirmed manufacturing defects:

After we receive and inspect the return, we will notify you of the outcome. Approved refunds will be issued to the original payment method within [INSERT REFUND PROCESSING TIME], subject to any shorter deadline required by law. Your bank or payment provider may need additional time to display the funds.

8. Exclusions Under Our Voluntary Policy

Our voluntary replacement and return policy does not cover:

  • Damage caused by reversed polarity, voltage above the specified limit, electrostatic discharge, incorrect soldering, or short circuits.
  • Products physically modified by soldering headers or wires, cutting PCB traces, removing shielding, or similar alterations.
  • Requests based solely on difficulty writing code, setting up a development environment, or achieving performance expectations beyond the published specifications.
  • Delivery failure caused by incorrect customer-provided addresses or phone numbers, or failure to complete required customs clearance.

Customer-caused delivery failures do not automatically qualify for a free replacement or refund under our voluntary policy. We will review any available recovery options, charges, and refund entitlement under applicable law.

These exclusions do not override rights relating to faulty or misdescribed products under applicable law.

9. Statutory Consumer Rights

If mandatory consumer law gives you additional or longer cancellation, return, or refund rights, those rights take priority over this policy.

10. Contact Us

Email: eshop-crab@realsil.com.cn

Support hours: Official working days in mainland China, 9:30 a.m.–5:30 p.m. Beijing Time (UTC+8).

Special holiday arrangements will be announced on our website. Please include your order number in any order-related inquiry.