What's in the box:

Andoer NP-F970 F750 Battery Plate Holder Adapter + LP-E17 Dummy Battery Coupler Compatible with Canon EOS 750D/760D/800D/77D/M3/M5/M6 Cameras (Type 2)

Features:
The battery plate is compatible with Sony NP-F550/F570, NP-F750/F770, NP-F950/F970 battery.
Supports DC 8V & DC 12V output voltages, can be used as power supply adapter of different devices.
You can install the battery plate to camera cage or other bracket via 1/4 inch screw or the included cold shoe adapter for more convenient usage.
Comes with a LP-E17 dummy battery coupler, which is compatible with Canon EOS 750D/760D/800D/77D/M3/M5/M6, etc.
With this battery plate + dummy battery kit, you can connect external battery power source to your camera to achieve long time shooting.

Specifications:
Brand: Andoer
Dummy Battery: LP-E6/LP-E17(optional)
Output Voltage: DC 8V & DC 12V
Package Size: 17 * 9.5 * 5.5cm/ 6.7 * 3.7 * 2.2in
Package Weight: 197g/ 7oz

Packing List:
1 * Battery Plate
1 * Dummy Battery
1 * DC Cable
1 * Cold Shoe Adapter