Specification         Name: Lithium Battery Capacity Tester Model: YPSDZ-0550 Voltage: 220V/110V (optional) Language: Chinese/English switchable Charging voltage: 1-5V adjustable Charging current: 0.5-50A adjustable Discharge voltage: 1-5V adjustable Discharge current: 0.5-50A adjustable Charging mode: constant current and constant voltage Discharge mode: constant current discharge (no spike pulse) Working mode: charge/discharge/cycle 1-5 times Alarm protection: Battery over-voltage/reverse battery    /battery disconnect/high temperature alarm and protection Calibration mode: factory calibration + third party professional calibration     (traceable to the State Bureau of Weights and Measures) Accuracy: voltage ± 0.1%, current ± 0.3% (allows authorized users to calibrate) Heat dissipation: temperature-controlled fan 40 & 8451; open     (please regularly check and maintain the normal operation of the fan) Working environment: 0-40 & 8451; ventilation, do not let the heat accumulated around the machine Net weight: 2kg Size: 150*215*170 (L*W*H)                Package Included:    Lithium Battery Capacity Tester*1    Power Adapter*1    Manual*1     Please note:     This product can't test more than 5V battery