Aputure Trigmaster Plus, 2.4GHz Radio Remote Flash Trigger and Shutter Cable Release, fits Nikon D90, D3100, D3200, D5000, D5100, D7000, and SB-600, 700, 800, 900, 910 Professional premium Grade 3-in-1 Multi-Function Radio Trigger for Flash, Strobe and Camera, 16 Channel, encrypted 2.4Hz with 600 ft. range, Sync Speed of 1/250 sec, when in "flash" mode. Enabled AF with half press of the Remote Button when in "camera" mode, 2 sec, delay function in both modes. In "camera" mode, remote is able to do continuous and "Bulb" by press and hold the trigger bottom for 2 sec, and press again to stop In "Flash" mode, the transmiter wakes up the "sleeping" flash, just in time for firing the flash. 24 Month Warranty