The Nikon WT-5A Wireless Transmitter enables wireless control and image transmission for your compatible Nikon DSLR camera. Designed primarily for the D4 and D4S, this compact accessory delivers a wireless range of up to 590 feet and transmits images to FTP servers or computers twice as fast as previous-generation models. Control your camera remotely using the web browser on your iPhone or iPad with HTTP Mode, including Live View shooting and HD video control. The WT-5A also supports PC Mode for operation via Camera Control Pro 2 software, allowing you to trigger up to 10 remote cameras from a single master unit. For use with D800 and D7100 models, the optional UT-1 Communication Unit is required. Weighing just 27 grams and measuring 32.0 x 41.5 x 30.0mm, the WT-5A draws power directly from your camera--no batteries needed--making it an efficient solution for professional wireless workflows.