YOE01B Operates from 4.8-60V. 0V with optional auxiliary battery. Measures 0-130A， resolution 0.01A. 0-60V， resolution 0.01A. 0-6554W， resolution 0.1W. 0-65Ah， resolution 0.001Ah. 0-6554Wh， resolution 0.1Wh. 16*2， backlit LCD display. Package Details Weight: 149.80 g Size: 12*8*4 cm Package Includes 1 × Watt Meter