S9Q Remote Control for Canon EOS 550D 500D 450D 400D 350D 300D T2i 5D Mark II 7D Size: 60 x 28 x 6.8mm Works from up to 8 meter (25 feet) away. Quick-response, Delayed and Bulb Battery : CR2025 S9Q Remote Control for Canon EOS 550D 500D 450D 400D 350D 300D T2i 5D Mark II 7D