"The Bower 3-in-1 Advanced Wireless Remote and Trigger provides photographers with a vast array of external control options to maximize your flash photography options. You can connect the REFLEx with your studio flash or speedlite to trigger synchronously. Four channels per receiver allow you to synchronize up to 16 strobes and flashes at once. You can also mount the transmitter onto your camera and attach the receiver to your speedlight hotshoe in order to wirelessly control it. Additionally, it can serve well as a remote shutter that can trigger your shutter in autofocus, single, continuous, bulb modes and more. Compatible with D1 D2 D2H D2HS D2x D2XS D3x D3S D4 D200 D300 D300S D700 D800 D800E|Acts as a camera shutter release and strobe trigger: As well as supports off-camera Speedlite control, making it easy to optimize lighting and improve your camera's photo captures from a variety of vantage points|Autofocus, single or continuous shot and bulb mode support: Ensures ease of use|4 receiver channels: Let you control up to 16 studio strobe lights or flashes simultaneously, simplifying light management|Wireless design: Receiver operates on the 2 included AAA batteries, while the remote operates on the included 23A 12V battery for reliable on-the-go power|Lightweight, compact design: For easy portability"