... 2.7V-3.6V to ensurethat WTV devices are optimized for a wide of battery or line-powered applications.WTV010 is ... lock actuator, TPMS(Tire Pressure Monitor System)* Home security system, Safely, Burglar alarm, Car alarm.* Home appliances (washing machine, induction cooker, rice cooker ... and any other products need voice messages integrated music chip for Home appliances