The Profoto Air Remote is a proprietary radio slave transceiver designed to work exclusively with the Pro 8a 1200 and 2400 Ws power packs. This transceiver can control an unlimited number of power packs and heads on eight channels. It can mount to your camera feets hot shoe, or sync to your flash terminal for firing. Operating from two AAA batteries, at a frequency of 2.4GHz, the Air Sync has a range of 1000 feet (300 m). It can sync up to 1/250 second with a focal plane shutter camera, and 1/500 second with a leaf shutter camera. Its triggering speed is over 100 fps. Full Control: Eight channels; Six groups per channel; Flash power range; Modeling light levels . Even More Control: Optional Air USB 2.0 transceiver enables full control from your Mac or PC with Profoto Studio software. Note:Not compatible with the Pocket Wizard system