This transmitter/receiver Wireless RF (radio frequency) remote control features a maximum operating range of 100m. It features three modes of operation:When the Receiver function button is in the W Mode, the receiver is active and can receive signals from the transmitter. This allows the photographer to use the Shutter and Focus buttons of the transmitter to control the Camera's shutter and Focus respectively.In O Mode position of the receiver, the transmitter can not activate the receiver to control the camera. In this mode, the receiver acts as a remote switch allowing its button to be used as a two step shutter button: half press for focus, fully press for shutter release.The L Mode position of the receiver turns on the camera to BULB mode allowing the camera shutter to be locked for long exposure.Compatible with the following camerasCanonEOS 1D Mark II, EOS 1D, EOS 5D, EOS 1DsEOS 1D Mark III, EOS 5D, EOS 1V, EOS 3EOS 1Ds Mark II, EOS D2000, EOS D30, EOS D60EOS 30D, EOS 20D, EOS 10DPackage includes:1 Wireless Remote control Transmitter1 Wireless Remote control Receiver1 AC adapterEnglish manual
