Features:Built-in quartz movement for accurate time keeping.Round dial and soft rubber strap, iti comfortable to wear.3 decorative small non-functioning sub-dials.Environmentally friendly, without gas, but is USB rechargeable.The watch can charge through the USB interface by a charging cableThe system starts working when the LED light turn lit during usage.Descriptions:If the single service time is longer than 15 seconds, the system will stop power automatically and the LED light will flash.The LED light will blink successively in case of under voltage, which means that batteries are in need of recharging.When charging, the LED light will turn lit and it will become dark when the batteries are fully recharged.Specifications:Case material:AlloyBand material:RubberSize:250*45*20mmPackage size:105*90*70mmPackage included:1 x Electronic Lighter Watch1 x USB Cable