1. The blue segment at the upper end is the external discharge terminal, and the lower end has the working indicator of the corresponding channel. 2. Voltage and current curve display, real-time voltage and current, DC two-wire method to measure internal resistance. 3. U-shaped groove at the back is combined with PCB board, and the fan actively dissipates heat to form a heat dissipation channel. 4. 18650 battery holder using compact battery holder, suitable for flat battery measurement. 5. Channel type: 8 channels, each unrelated, operation, without mutual influence. Channel synchronisation: support 8 channels to set up synchronisation, also can set up each channel parameter individually. Cycle charging and discharging: only support charging-discharging-charging 1 cycle in automatic mode, do not support multiple cycles. Color:Black Material:ABS Package Contents: 1 * 18650 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.