DIY LED Digital Watch Electronic Clock Kit With Transparent CoverFeature Name LED digital watchesOperating voltage 3VPower supply CR2025 button battery as gift for testing inevitably there are additional factors causing low Display Red LED displayInstallation Need DIY welding assemblyClock adjustment Key regulatorWhether saving power Five seconds automatically enter power saving mode After all LED display is more power consumption so a battery life is not very long About half month need to change a battery Waterproof NOSize 16mm diameter 54mm thick strap 2 x 25cmWeight 48gNote The watch band color is random delivery Package included 1 x LED Digital Watch Kit