Featrues: The USB-C PD system can replace traditional AC adapters or batteries, it allows you to power your device using the external powerbank/charger with USB 3.1 Type-C output to achieve long time shooting, no need to replace battery again and again. Connect the USB-C Type-C plug to power source and put the coupler into the battery compartment to provide stable and continuous power supply for your device. The adapter cable is designed with voltage conversion circuit and circuit protection. Spring cable, very convenient and easy to use and pack. No more interrupt during the shooting. Applicable power supply: power bank and mobile power bank with PD 9V protocol output. Specifications: Input voltage: Type-C PD 9V Output voltage: 7.4V-8.4V Wire length: 35cm-100cm DC port size: DC 5.5*2.1mm Compatible replacement: NP-F550/F750/F970 battery Applicable model: For NP-F series battery monitors, wireless image transmission, LED fill light, etc. (Not available for compatible with Sony camera) Package Included: 1 x USB-C to NP-F550 Dummy Battery Power Adapter