?Model: YKS-RE004 Color: Black + silver Material: PU rubber + ABS + stainless steel  12/24 time display Supports 2 groups time display DST (Daylight Saving Time) function Allows preset 3 alarm time Contact heart rate monitor Dynamic displays pulse rate  SPL function  Chime on every hour Stopwatch and countdown timer 3 seconds EL backlit Water resistant (not for diving/swimming) Powered by 1 x CR2032 battery (not included) Wristband length: 25cmPacking list:1 x Wrist Watch 1 x English user manual <img src="//112.74.112.28/down/products/95427/95427_000.jpg">