This is USB power on off switch cable, it is usually used with USB gadget wihtout on/ off button like mini fan, laptop lamp, external drive... etc, it save effort to plug and un-plug USB power cable.
Note:
- Transfer power only, not for data
- Power supply is not included
Packing List (bulk pack):
Features:
- USB female to USB male
- Add On/ Off button to USB devices
- Simple connect plug and play
- Total length around 31cm (12.2 inch)