WATERPROOF FUNCTION: 164 ft waterproof (50 M) - 5ATM. In general, suitable for swimming and snorkeling, but not for diving. NOTE: please DO NOT press any buttons in the water : Shock , LED back light functions perfect for all kinds of sport and daily use STYLISH FASHION: Stainless Steel Case, Silicone Band, and Movement comfortable to wear and lead you to the edge of sport fashion. Perfect for both indoor and outdoor activities MULTI-FUNCTIONAL: Altimeter, Barometer, Compass, Thermometer, Weather forecast, World time, Dual Time, Alarm/stopwatch/, Water , LED Display, Back Light, Shock Product parameters Strap circumference: 24cm Built-in battery: CR2016 Colour:Orange black background Material:Stainless steel Size:43 x 53 x 14mm Package Contents: 1 * Smart Watch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.