Features: This product is a 18650 battery capacity tester, which is specially used to measure the capacity of 18650 batteries. The 177-inch TFT- display can simultaneously display information such as battery internal resistance-, capacity, voltage-, current, power, etc. The tedious- operation of charging and discharging the device; preset- automatic, charging and discharging three modes-, select the corresponding mode to start the device, and the program will run automatically; the discharge current can be switched, which is convenient to use. technical parameter:Working voltage-: DC5VElectrical measurement voltage-: DC5V Capacity measurement range: 0~99999mAh-Energy metering range: 0~99999mWh Discharge load: 10W 8J cement resistance- x2Discharge current selection: 0.5A or 1ACharging port: Type-C Preset- discharge stop voltage: 3V (not adjustable-)Preset- full stop voltage: 4.2V (not adjustable-)Data retention: the measurement data is not saved-, and the accumulated data is automatically cleared- when the power is turned off or when the working mode is switched. Specifications: Material: ABS Size:As Picture Shown 18650 batteries are demonstration props-, not included in package. Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Battery Capacity Tester