With a Dual Function On/Off Switch. The Photon Micro Light II features a convenient on/off switch for continuous use in addition to the standard squeeze button. Available in 7 different Beam Colors. Your choice of White, Red, Blue, Yellow, Green, Orange and Turquoise. Gold Plated Leads! Gold plating in the Green, Turquoise, Blue, & White LED leads improves the electrical contact with the battery and also protects the Photon light from corrosion. With the battery life of the Red, Orange and Yellow lasting 120 hours of continuous use whilst the Green, Turquoise, Blue and White will run for 12-14 hours with the included CR2016 Lithium batteries. Compare to about 5 hours from a typical C-cell flashlight. Incredibly tough Glass-filled Polyurethane construction. The polyurethane case of the Photon Micro Light II is practically indestructible and is very abrasion resistant.