ZGR-1b GPS Unit and Timer Remote Control works with Nikon DSLR and iPhone, Supported Cameras: Nikon D7000, D5100, D5000, D90, D3200, D3100, D600 New ZGR Pinout just launched on Indiegogo. A short url is http://igg.me/at/pinout For location shooting, Shutter release, Long-exposure,Continuous-exposure and Time-lapse It provides GPS functions and help you to control exposure time, interval time and delay time. it also provides remote shutter release function, auto-focus function and a lock function for bulb. ZGR-1b Supported Cameras: Nikon D7000, D5100, D5000, D90, D3200, D3100, D600, D5200