The EZa-C3 Digital Timer Remote is for Canon EOS series DSLR. Specifications Display Lighting: Supports light for 6 seconds Release Button: Supports the remote control of half-press to focus and full-press to release shutter Camera Connection: The remote control socket can be locked Cord Length: 90 cm Power supply: 2* 3A batteries (battery not included) Working temperature: -20 - 50 Celsius degree Compatibility Canon EOS 7D, 50D, 40D, 30D, 5D, 20D, 10D, 5D Mark II EOS 1D Mark IV, 1Ds Mark III, 1D Mark III, 1D Mark II N, 1Ds Mark II EOS 1D Mark II, 1Ds, 1D, 1V, EOS 3, D2000 Package Includes1* Digital Timer Remote Control1* User Manual