PIXEL TC-252/N3 Wireless Shutter Remote Control Release for Canon EOS 7D, 5D series, 1D series, 6D, 50D, 40D, 30D, 20D, 10D Camera Advanced camera shutter release tool which can be used to release camera shutter Cable unstretched length:0.4m (1.3ft); Max Stretched length: 1.6m (5.2ft) 2 AAA batteries for receiver included; 1 CR2 battery for transmitter included Self-timer, interval timer, long-exposure timer, and exposure count setting features Handy for taking pictures of subjects that are difficult to approach with minimized vibration