1. The use of materials, long service life, circuit, stable performance and high efficiency. 2. Reverse connection protection: with reverse connection protection, even if the wire is reverse connected, it will not be . 3. With fan control: Intelligent fan control (the fan can automatically change speed according to the temperature of the radiator). 4. Protection functions: overheat protection "otP", instantaneous overpower protection "oPP", overvoltage protection "ouP", reverse connection protection, power supply voltage abnormal protection. 5. Wide range of applications: can measure the actual capacity of the battery, test the actual power of the load and other purposes. Color: As Shown Material: ABS Package Contents: 1*Battery Capacity Tester Only the above package content, other products are not included. Note: Light reflection 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.