Infrared Remote Control for Sony A550,A700,A850,A90 The infrared remote control can trigger the camera shutter release remotely from a distance. The compatible camera has a built-in infrared receiver for this remote trigger device. It has been proved to be safe and reliable with the multi-brand cameras (see more details in the picture above), and works with all camera remote control modes (Quick-response, Delayed and Bulb). Works from up to 8 meter (25 feet) away.Specifications: Battery: CR2025 (3V and replaceable) Style: IR Remote Control Dimension: 86 x 40 x 6.5mm / 3.38 x 1.57 x 0.26" Operating temperature: 5 o.C to 4 o.C (40 o.F to 105 o.F) Typical battery life: Up to 3 years, 20,000 exposures Operation distance: 1cm- 20 MetersSuitable models: Sony NEX-5 Sony A55/A33 Sony A900, A850, A700, A580, A560, A550, A500, A450, A390, A380, A330, A290, A230 Package Includes: Remote Controller x 1 Lithium Battery x 1