... record the working time together. GY-806 Volt Hour Meter can display the volt and record the working time together.Main features ... in golf carts, cleaning equipment, vehicles, engineering vehicles, scooters, electric bicycles, electric water scooter, medical devices and other equipment, the voltage on ... %RHQuake-proof range:10-70HZ 1-8gMounting Size: DJP-806 Volt Hour Meter