Vello Wireless ShutterBoss Timer Remote (Canon 3-Pin Connection) - Canon EOS: 10D, 20D, 30D, 40D, 50D, 5D, 5D Mark II, 5D Mark III, 6D, 7D, 1D, 1Ds, 1DS Mark II, 1Ds Mark III, 1Ds Mark IV, and 1D X 99 Possible Radio Channels | Up to 250' (80 m) Range | Trigger Camera Wirelessly or Wired Dual-Function (Focus & Trigger) Release | Delay Release Function | Multi-Exposure Mode Interval Control | Long Exposure Control | LED Indicators--Pre-Focus & Exposure In The Box: ShutterBoss Transmitter, ShutterBoss Receiver, 2.5mm Shutter Release Cable for Canon Cameras with 3-Pin Connection, CR2 3V Lithium Battery, 2 x AAA Battery, 1-Year Limited Manufacturer Warranty