Fotga Timer Remote Shutter Release Cord for Canon EOS 1Ds Mark II & 1Ds Mark III 5D Mark II III IV Ideal for time-lapse photography including blooming flowers and astrophotography Self-timer, interval timer, long-exposure timer and exposure-count setting features Easily enter the numeric settings with a single thumb,LCD panel can also be illuminated The remote switch function can be used without battery power If you have a new different camera, it's no need to buy a new set, you just need to buy a related shutter connecting cable to connect with your camera