Prevention of burning warning: When inputting voltage battery and test, you must first use two current adjustment knobs counterclockwise to the minimum to zero, and then when connecting, adjust the current knob slowly according to the current power priority, and the transmission must be dissatisfied immediately, so it will There is a risk of excessive instantaneous power discharge tube burnout! Two power modes: DC6-12V DC5.0 power supply DC6-12V -USB power supply. Voltage measurement range: 0.00V - 200V, current measurement range: 0.00A - 20A. Operation : set capacity, power supply, time, use keystroke to reset: 1. Reset all data of the long button (mAh, Klitschko, 00:00) 2. Quick button double capacity reset (mAh) Quick button three power reset () 4. Quick button four reset (00: 00:00) 5. kinds of quick buttons set automatic standby, regular discharge countdown no load output, no load, fast seven keys, current zero current, accurate calibration of temperature. 150W power reference: According to the calculation P=UI (power=voltagexcurrent) 10V input about 18A discharge current, 20V input about 9A discharge current, 30V input about 6A discharge current. colour:Black Material:plastic Package Contents: 1 x Electronic Load Battery Tester Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.