The Air Sync Transceiver for Packs and Heads with Built-in Air from Profoto is an eight channel radio slave transceiver designed to work with the any Profoto pack or head with built-in Air radio technology. It will also function with other power packs or monolights without built-in radio slaves by simply wiring a second tranceiver to it. The Air Sync can control the firing (but not power levels) of an unlimited number of power packs and monolights on eight channels