Features: The product supports 2-channel capacity and internal resistance measurement. Supports separate charging and discharging, and supports up to 9 charging and discharging cycles in automatic mode. Each channel is of the other, can be set up separately, operation, no interference with each other. Strong battery clip, 18650 battery holder using compact battery holder, suitable for flat battery measurement. battery charging chip control, maximum about 1A charging, full voltage 4.2V, charging current less than 0.1A stop charging. Parameter: Working voltage: DC 5V Applicable batteries: meet the stop discharge voltage 2.5 ~ 3.5V, 2.8V start ~ 4.2V full of batteries are applicable Power supply interface: Type-C power supply interface Test quantity: 2-way charging and discharging measurement Internal Resistance Measurement: Support, using DC two-wire method to test internal resistance. Charging function: support, full of automatic cut-off charging (does not support lithium iron phosphate battery charging) Discharge function: Support, automatically stop when conditions are reached, discharge current is not adjustable. Automatic charging and discharging: Support, the battery is fully at of automatic mode. Cyclic charging and discharging: Support, 1~9 cycles adjustable (only automatic mode support) Status Alert: Support Heat dissipation mode: fan active heat dissipation Overheating protection: Support Stop Discharge Voltage: 2.5V, 2.6V, 2.7V, 2.8V, 2.9V, 3.0V, 3.1V, 3.2V, 3.3V, 3.4V, 3.5V, adjustable in 11 steps. Discharge current: maximum of about 1A non-constant current, non-adjustable, does not support transformation Charging voltage: special battery charging chip control, maximum about 1A charging, full voltage 4.2V, charging current less than 0.1A stop charging. Material: plastic colour: green Package Contents: 1 x 18650 Lithium 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.