ZGR-2a, Wireless GPS Unit and Timer Remote Controller works with Nikon Cameras and iPhone New ZGR Pinout just launched on Indiegogo. A short url is http://igg.me/at/pinout Wireless GPS Unit and Timer Remote Control Accessory works with Nikon DSLR Camera and Apple devices(iPhone,iPod Touch or iPad) It was made For location shooting, Shutter release, Long-exposure,Continuous-exposure and Time-lapse It provides GPS Uinit, remote shutter release function, auto-focus function and a lock function for bulb. Take with Shake phone and volume button. ZGR-2a Supported Cameras: Nikon D4, D3S, D3X, D3, D800, D800E, D700, D300, D300S, D2X, D2XS, D2HS, D200