TTL Wireless Flash Transmitter XProO (for Olympus and Panasonic) offers Better User Experience (Sold Separately):
With 2.4G wireless transmission, XProO fits for Olympus and Panasonic cameras and can be used to trigger camera flash, studio flash and camera shutter over a 50 metre distance.
Support for TTL auto flash, manual flash, multi flash, 1/8000s high-speed sync, flash exposure compensation, manual focus assist, rear curtain sync, etc.
Guide No. (1/1 output @ 105mm): 36 (m ISO 100)
Flash Coverage: 24 to 105mm, Auto zoom (Flash coverage set automatically to match the lens focal length and image size), Manual zoom, Swinging/tilting flash head (bounce flash): 0 to 270 degrees horizontally and -7 to 90 degrees vertically
Flash Duration: 1/350 to 1/20000 seconds
Exposure Control System: TTL auto flash and manual flash