【Product introduction 】 GPS Car Digital Inclinometer is a multi-function car gadgets which can be used as a vehicle GPS units & equipment, car alarm switch , o car digital clock. The driver can use the multifunctional digital speedometer to measure the slope and inclination, the degree of downhill and uphill of off-road vehicles. It also provides vehicle speed, altitude and vehicle driving direction, and has high- precision satellite real-time clock function, avoiding the potential danger caused by looking down at the instrument, so that improving driving safety. 【Easy to operate and install】 Step 1: Plug the cigarette lighter to the car. Step 2: Hide the power cord in the seam inside the car if necessary. Step 3: Plug the power connector to the GPS Car Digital In clinometer . 【Product parameter】 ● Working voltage: DC5V-28V ● Working current: 50mA(max) ● Quiescent current: 5mA ● Working temperature: -20°C~ 70°C ● Clock error value: <1 minute ● Voltage measurement range: DC12V ● GPS data refresh time: 1s ● Product size: 115 ×125 × 65 (mm) ● Weight: 253g 【Package list】 ● GPS Car Digital Inclinometer main unit×1 ● Car cigarette lighter power cable×1 ● Mini USB refitted power cable×1 ● Double-sided adhesive tape×1 ● Certificate of compliance×1 ● User manual×1 NOTE: ●please read user manual clearly before use