Features: brand new and high quality Replace the real battery with an external power supply to provide long-term power supply to the SLR camera, so that the SLR camera can work for a long for time. Suitable for A7 A7II A7R A7RII A7S A7SII A7MII A3000 A5000 A5100 A6000 A6300 A6500 A33 A35 A37 A55 NEX3 NEX5 NEX7 RX10 and more. Need 5V 2A-4A USB powerbank, mobile USB power or charging plug (not included) for power supply, largely prolong the shooting for time of your camera. Spring cable,No more interrupt during the fielding. Easy to pack and user-friendly design. Takes the place of the NP-FW50 type battery pack and provides a connection to the power source for long-term, continuous operation of your camera. It is a best choice for long for time photography for studio and indoor shooting. Specifications: Material:ABS Output: 8.4V±0.5V (USB port can be connected to powerbank 5V2.1A and above parameters) Conversion Efficiency: 98% (DC-DC high conversion rate) USB Plug Specification: USB 2.0 Length:Approx. 200cm/6.56ft Package Includes: 1x Dummy Battery Adapter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.