Features: The PROMASTER BLUE TOOTH TIMER REMOTE receiver adds new functionality to your iphone or other “i” device and any wired remote capable DSLR, Mirrorless, or Compact camera. With multiple modes, this remote receiver and your “i” device extends your picture taking capability and allows you to get pictures of a lifetime that you may not ordinarily be able to capture. The timer and scheduling functions will let you set your camera to take pictures as many as 100 hours in the future! When connected to your camera with a PROMASTER Camera Release Cable (required separate purchase), the PROMASTER BLUE TOOTH TIMER REMOTE functions as an instantaneous wireless remote, a multi-mode wireless timer remote, and even as a basic wired remote control. + Operating range: up to 164 / 50m + Bluetooth Version: 4.0 + Power Source: 2 AAA 1.5v batteries + Dimensions: 2 11/16 x 1 x 11/16″ / 69 x 38 x 18mm + Weight: 1.02 oz. / 29g REQUIRES SEPARATE PURCHASE OF PROMASTER CAMERA RELEASE CABLE FOR YOUR SPECIFIC CAMERA