What's in the box:

Andoer DR-FW50 Fully Decoded DC Coupler Dummy Battery Replace of NP-FW50 Battery with USB DC Converter Power Cable Wall Plug Compatible with Sony A7 A7R A7S A7M A7II A7S2 A7M2 A7R2 A6500 A6400 A6300 A6100 A6000 A5100 A5000 A3000 NEX5 NEX7 DSC-RX10 (Uk)

Features:
Replacement for Sony NP-FW50 battery. Compatible with Sony A7, A7R, A7S, A7M, A7II, A7S2, A7M2, A7R2, A6500, A6400, A6300, A6100, A6000, A5100, A5000, A3000, NEX5, NEX7, DSC-RX10, etc.
The item can connect a power bank for outdoor long time photography or connect the included wall plug when shooting a long time indoors to provide uninterrupted power supply.
Safety Protection: Passed CE certification, build with premium IC chip inside. Featured with over-charging, short-circuit, overheating, over-loading protection, which ensures the absolute safety during use.
USB Power Input: 5V, 2A-4A single USB input design (At least 2A current, up to 4A if needed). DC Output: 8V. Connect directly to various USB power sources for power supplying.
Total cable length is up to 200cm. Long enough, very convenient to put your own power bank or mobile power in your pocket or bag, or at somewhere else.

Specifications:
Brand: Andoer
Model: DR-FW50
Plug Type: UK plug
Plug Input Voltage: AC 100-240V
Compatibility: Compatible with Sony A7, A7R, A7S, A7M, A7II, A7S2, A7M2, A7R2, A6500, A6400, A6300, A6100, A6000, A5100, A5000, A3000, NEX5, NEX7, DSC-RX10, etc.
Input Voltage & Current for Dummy Battery: USB 5V 2A-4A
DC Output: 8V
DC Jack: 5.5*2.1mm
Cable Length: 200cm
Item Weight: 137g / 4.8oz
Package Size: 12.2 * 11.3 * 3.5cm / 4.8 * 4.4 * 1.4inch
Package Weight: 162g / 5.7oz

Packing List:
1 * Andoer DR-FW50 DC Coupler Dummy Battery
1 * USB DC Converter Power Cable
1 * Wall Plug