The WT-5A Wireless Transmitter is designed for use with the Nikon D4/D4S DSLR cameras. It can also be used on the D810, D810A, D800, D800E, D750, D7200, D7100 and D7000 DSLRs when used along with the UT-1 Communication Unit. HTTP Mode: Now you can use the web browser on your iPhone® and/or iPad®** to operate camera controls or begin Live View shooting, including starting and stopping HD video and more. **iPhone® and iPad® are registered trademarks of Apple Inc. Image Transmission Mode: Transmit images to an FTP server or computer two times faster than the Nikon WT-4. PC Mode: Operate the D4/D4S via Camera Control Pro 2. From one master camera, simultaneously release up to ten remote D4 or D4S/WT-5 combinations. WT-5 + UT-1 Communication Unit: The WT-5, when connected to the UT-1 Communication Unit, can be connected to the D810, D810A, D800, D800E, D750, D7200, D7100 or D7000 DSLRs. UT-1 Communication Unit UT-1 Communication Unit + WT-5 Wireless Transmitter Specifications: WT-5 Standards: 802.11 a/b/g/n Operating Frequencies (MHz): 5180-5320 MHz (36/40/44/48/52/56/60/64 ch) Approx. range (line of sight): 180 Meters (With large antenna at wireless LAN access point. Range varies with signal strength and presence or absence of obstacles.) Security: Authentication: Open system, shared key, WPA-PSK, WPA2-PSK; Encryption: 128/64 bit WEP, TKIP, AES Wireless setup: Supports WPS Access protocols: Infrastructure, ad hoc Data transfer protocols: PTP-IP, ftp