Item Type: Np F Battery Adapter Plate Weight: 1768g/62.4oz Material: Aluminum alloy and silicone Interface: 1/4 in screw hole, 1/4 in screw 5.5 x 2.1mm DC Output: 8V 3A 5.5 x 2.5mm DC Output: 12V 3A USB Output: 5V 2.1A Applicable Battery: NP F series battery, such as NP F550, NP F970, NP F770 Package List 1 x Power Supply Base 1 x Hex Wrench (installed) 1 x Cross Wrench 1 x Instruction Manual Note voltage input and output parameters and interfaces to avoid damage to equipment and products. 1Compatible with NP F Series Batteries: DC 12V, DC 8V, USB 5V DC output design to provide a better power solution for your SLRS, mirrorless cameras and other photography equipment. 2Increase Friction: Panel base anti slip pad design, increase friction, protect the equipment from scratch, play a better protective role. 3With Self Locking Button: Red self locking button, strong locking force, for quick battery disassembly and installation, provide you with convenience. 4Easy Installation: With two 1/4 inch screws, you can easily install the battery holder to other devices, which is very convenient and fast for different installation scenarios. 5Display Battery Power: With 4 indicators to clearly show the remaining battery capacity, can avoid the embarrassment of finding out the battery is dead when using the battery.