Atoplee Boat Truck Tractor SYS-1 10v -80v Dc Diesel Outboard Engine Hour Meter Rectangular The timer operates on in put voltages from 10 to 80 Volts DC. The meter has a positive and a negative lead for easy installation. 6 digit display, from 1/10 hour Widely used for tracking time on machinery such as boats, cars, trucks, tractors or any other device It is designed to withstand vibration and shaking up to 8g. Package Included : 1 x Rectangular Hour Meter The hour meter timing mechanism contains a quartzoscillator which provides a high degree of accuracy . This  rectangular hour meter can be used for tracking time on machinery such  as boats, cars, trucks, tractors or any other device where time is used to determine oil change intervals, service requirements or where there is a need to record hours operated. The meter has positive and a negative leads for easy installation. The timer has a 6 digit display with the least significant digit being 1/10 hour (99999.9) and operates on in put voltages from DC Volts 10-80 DC. Size(about):5 x 3.3 x 2cm Power: 3W Use temperature: -10  - 75 Package Included: 1x Hour Meter