Satechi WTR-B Wireless Timer Remote Control Shutter for Nikon DSLR Uses 2.4 GHz radio frequency (RF) technology Handy for taking pictures of subjects that difficult to approach with minimized vibration Ideal for time-lapse photography including blooming flowers and astrophotography Function as self-timer, interval timer, long-exposure timer- can be programmed as an intervalometer Includes time remind speaker and release signal lamp, LCD display and screen illuminator