Package included:
1 x AC Adapter DMW-AC8 
1 x AC Cord( US Plug )
1 x DC Coupler DMW-DCC12

Features:

Rated Power: 17W

Input: AC 100-240V, 50-60Hz, 1.5A 
Output: DC 8.4V, 2A
Short and Overload Circuit Protection.

Uses: 

for PANASONIC DMW-BLF-19 Battery Replacement. Put the DC coupler into the battery compartment and close the cover, then connect the power adapter and power.

Fit For: 

for Panasonic Lumix DMC-GH3, DMC-GH3A, DMC-GH3K, DMC-GH3H
for Panasonic Lumix DMC-GH4, DMC-GH4K, DMC-GH4K
for Panasonic Lumix DMC-GH5

NOTE：The DC Coupler can not work alone without the AC power adapter. Make sure the battery cover is fully closed before you shooting.