Promaster Infrared Remote Control - for Olympus The PROMASTER wireless infrared remote control instantly triggers the shutter of your camera. A MUST HAVE accessory for anyone using a tripod. Perfect for taking pictures of subjects that are difficult to approach, or for close-up and time exposure photography. Helps to minimize vibration when using long telephoto lenses so you get much sharper pictures. Easy-to-replace CR2025 lithium battery Typical battery life: up to 3 years, 20,000 exposures Operation distance: 1cm-20 meters Dimension: 86 x 40 x 11.5 MM Weight: 22g