This cable can step up voltage from 5V to 12V, and let you connect your 12V 1A device like router or TV box from USB 5V power supply.
Packing List (bulk pack):
Features:
- Circuit borad inside USB port, step up voltage from 5V to 12V
- Fixed step up to 12V voltage, max ampere is 1A, not for device over 1A
- DC jack is 5.5 x 21.mm
- Cable length around 90cm (3 ft)