Model:AC300-100A 1. Voltage: AC50-300V 2. Current: 0-100A 3. Power: 0-30KW 4. Capacity: 0.01-19999Kwh 5. Timing: 0-200H 6. Temperature: -10 ° C to 99 ° C 7. Package include:1*1 x Meter,1 x 100A shunt/CT Coil,1*Usuer Manual Product Function: 1. Volage curent, power, iming. humilyCurrent electical energy,cumulative electrical energy 2. Electic energy and üming can be reset 3. Electic energy and iming have power down memory uncion 4. Rated frequency 45-65Hz Operating Instructions: Click the MENU button on the panel to view the current electrical energyand cumulative electrical energy. Electric energy and timing reset method: Press and hold the MENU button for 5 seconds, the number in the timingarea will flash, then click the button to select timing, current electricalenergy and cumulative electrical energy reset. When the number flashes,double-click the button to reset. Press and hold the button for 5 secondsto save the settings. NOTE: Model:keweisi (this product model is KEWEISI,not JUANJUAN, please kindly note it!!!! )