SMDV RFN-4 Wireless Remote Shutter Release Cable
 for Canon EOS 5D, 5D Mark II, 1D, 1Ds, Mark II, III, IV, 7D, 50D, 40D, 30D, 20D, 10D, Features: • 2.4GHz Frequency with 16 Selectable Channels • Slim Design and Ergonomic Wired / Wireless Remote Control • Exchangeable Camera Release Cable • Circuit Designed to Operate in Extreme Temperatures • Auto Sleep Mode After 2 Hours of Non-Shooting