Promaster Infrared Remote Control - for Olympus RM-1 Infra-red remote compatible with Olympus brand DSLRs and point and shoots with remote capability Operation distance: 1cm-20 meters Dimensions: 86 x 40 x 11.5 MM Weight: 22g Easy-to-replace CR2025 lithium battery Typical battery life: up to 3 years, 20,000 exposures