Wireless Remote Control
From Amazon
Hähnel - Viper TTL - For MFT (Micro Four Thirds) - TTL Transmitter
CVP
Hahnel Viper TTL Transmitter Micro 4/3
WEX Photo Video
Hahnel Viper TTL Transmitter for Olympus / Panasonic
Clifton Cameras
Hahnel Viper TTL Transmitter - Micro 4/3