Last updated: July 24, 2026
Order processing
Orders are generally prepared and dispatched within 2 business days after payment is confirmed. Orders placed on weekends or public holidays begin processing on the next business day. Processing may take longer during high-volume periods or when an address, payment or compliance check is required.
Shipping destinations and delivery estimates
We ship to major international destinations where delivery of the ordered optical product is permitted. Available services, estimated delivery times and shipping charges are shown at checkout based on the destination and order details. Delivery estimates begin after dispatch and are not guaranteed arrival dates.
Tracking and carriers
Tracked delivery is used whenever available. After dispatch, we will send tracking details to the email address provided with the order. Carrier selection may vary by destination, service availability, package size and local delivery requirements.
Shipping charges, duties and taxes
Shipping charges are calculated at checkout. Unless checkout states otherwise, customs duties, import taxes, brokerage fees and other destination-country charges are the customer's responsibility. These charges are not controlled by USEEIN and are not included in the product price.
Address accuracy
Please review the complete delivery address before submitting an order. Customers are responsible for providing an accurate, deliverable address. Contact sales@useein.com immediately if a correction is needed. We cannot guarantee changes after an order has entered fulfillment.
Delays and unavailable items
If we cannot ship within the stated timeframe, we will contact you with the revised estimate and provide the option to accept the delay or cancel the unshipped order for a prompt refund. We may also cancel and refund an order when stock, carrier service or legal restrictions prevent fulfillment.
Lost, damaged or incomplete deliveries
If tracking shows an unusual delay, or a package arrives damaged or incomplete, contact us promptly at sales@useein.com with your order number, photographs where applicable and any carrier documentation. Keep the packaging and product until the review is complete. We will work with the carrier and offer an appropriate replacement, reshipment or refund when the claim is verified.
Delivery restrictions
Customers are responsible for confirming that the ordered item may be lawfully imported, possessed and used at the destination. We may refuse or cancel orders to restricted destinations or when required by applicable law, carrier policy or payment-provider rules.
Contact
Questions about an order or shipment can be sent to sales@useein.com. Please include your order number for faster assistance.