DROKxae; 0.36" Micro LED Digital Ammeter Board Module DC4-30V 0-10A Current Monitor Tester3 Digit Ampere Panel Meter with Red Digital Display for Automotive Vehicle Car Battery Measuring range:0-10A; Power Supply: DC 4V-30V. With reverse connection protection to prevent the module form burning. High quality LED digital tube, the data can be clearly be shown even in the sun. Operating Current: less than 8mA Note: Shunt must be installed before installing the ammeter to prevent the ammeter form damage.