Zigview Twin 1 R3-UT max Universal Infrared Wireless & Wired Remote Shutter Release Transmitter for Nikon D70 & D80's More than triple the operational range of other IR transmitters. Compatibility: Nikon D80 & D70s Includes Cable Release for wired shutter release function. Can be used with B settings for convenient and accurate time exposure control. Battery power saving design - provides longer operation time. (battery is easy to replace)