Incredibly bright and ruggedly tough, the Photon Micro-Light II Infrared features a dual function on/off switch plus momentary squeeze button. Living up to its name of Micro-Light, the LED flashlight can nearly hide underneath a U.S. quarter and weighs just 0.25 ounces. It's solid construction is designed for a lifetime of trouble-free use. The superior engineering and durability have made the Photon Micro-Light a highly demanded accessory.The Photon II features a sliding on/off switch for extended use, as well as a momentary squeeze-button similar to the one found on the squeeze only Photon Micro-Light I. The long-lasting, replaceable lithium battery is always ready even in subzero temperatures and powers the flashlight for up to 36 hours.