Product Specifications Condition: 100% new Color: Black Material: Plastic & metal Voltage: DC 10V-80V Power: 0.3W Use Temperature: -10&deg -50&deg Size: approx. 7.5*6*3.2cm Item included: 1 x hour meter Suitable 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 Note: The item without "automatically to zero" function PRODUCT DESCRIPTION Feature: 1) The meter has positive and a negative leads for easy installation. 2) The timer has a 6 digit display with the least significant digit being 1/10 hour (99999.9) and operates on input voltages from DC Volts 10-80 DC. 3) The hour meter timing mechanism contains a quartz oscillator which provides a high degree of accuracy. SZRH A-FDc10v-80v Portable Engine Gaug