DESCRIPTION

1. IN - Contact with chargers

2. RTZ - Rest , hold 3 second to zero

3. OUT - Contact with USB of Cables

4. Voltage : 4-20 V  +/-1%

5. Current : 0-3 A  +/-1%

6. Capacity : 0-9999 mAh

7. Time : 0-99H

8. Memory when power off

Model: KWS-V21

Material: Plastic

Color: Black

Size: 59*23*13.5mm

Net weight: about 20g