1. Wide voltage power supply, high conversion efficiency up to 96%, low heat generation, high power, and can be used for without power outage. 2. Built in input output reverse, high voltage, and overload protection circuits allow safe and reliable use of batteries, making the device . 3. Compatible with replacing NP-F550/F750/F970 batteries, with the same effect as using batteries. 4. It can also be applied to monitors using NP-F series batteries, wireless image transmission, LED fill lights, etc. Input voltage: 12V-16.8V Output voltage: 8V/4A Colour:black Material:Metal Package Contents: 1 x Metal V-port battery buckle to NP-F power supply board(label random , don't accept the specified) 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.