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• Stocked products ship within 5 business days after order confirmation.
• Custom-made products typically ship within 4–8 weeks.
• Delivery times may be affected by holidays, customs clearance, or other unforeseen events.
• Tracking information becomes available 3–5 days after dispatch when the parcel is handed to the local courier.
• Some deliveries may require customer pickup. Please ensure your contact information is correct and respond promptly to courier communications.
• General international parcel shipping cost: USD 35 (for reference).

1. 符合条件的产品

单价低于 500 美元的库存（目录）商品可在规定时间内退货。交货后14天。

定制商品或非库存商品不适用无理由退货政策。

2. 无理由退货（买家后悔）

如果您因产品缺陷或卖家错误以外的原因想要退货：

• 请发送电子邮件shop@syronoptics.com申请退货授权和退货地址。
• 买家需承担所有退货运费。
• 商品必须未使用过，保持原状，并带有原包装。
• 退款将在收到退回商品并经检验后发放。

3. 卖家过错（商品有缺陷/发错/损坏）

如果退货是由于卖家错误造成的（产品有缺陷、发错货或运输过程中损坏）：

请提供清晰的证据（照片或视频）来证明问题所在。

我们将评估此案，并采取以下措施：

• 提供替代品，或
  发放退款（无论是否要求退回商品）。
• 如果确认是卖家的过错，退货运费将由卖家承担。

4. 重要提示

• 退回的商品需经过检验后方可获得退款批准。
• 除非退货是由于卖家的过错，否则运费、关税和税款均不予退还。
• 未经授权的退货将不予受理。

Payments can be made online using Credit Card, Apple Pay, Google Pay, WeChat Pay, and Alipay.

If you prefer to pay by bank transfer, please contact shop@syronoptics.com to request an invoice with our banking details.

If you require deferred payment terms, you may request NET 7 or NET 30 at the time of placing your order.

All requests for deferred payment are subject to approval and will be confirmed by SyronOptics via email.