The manual says this, I have made bold what might be seen as the relevant part (caveat emptor, perhaps) :-
Compatible Camera Models
This flash unit can be used on the following camera models:
Olympus: E-M10II, E-M5II, E-M1, E-PL8, E-PL7, E-PL6,E-PL5, E-P5, E-P3, PEN-F
Panasonic: DMC-GX85, DMC-G7, DMC-GF1, DMC-LX100, DMC-G85
● This table only lists the tested camera models, not all Olympus/Panasonic cameras. For the compatibility of other camera models, a self-test is recommended.
● Rights to modify this table are retained.
● Note: With the Panasonic cameras in wireless control mode, the High-Speed Sync may not sync fire.