**Interchangeable strap construction** All strap are completed with interchangeable strap construction. It is an easy, friendly way for you to detach and attach the strap. Just slide the lever with finger on spring bar on the backside of watch. You can change your strap easily with no additional tools entailed. **SHIPPING** Free standard shipping by country’s local stream. You may receive the parcel in 5-20 days from the date that it is shipped out. The time depends on your location local postal service.