Photon Microlight 2, White Photon Micro-Light 2 Dual Function On/Off Switch-/off switch for continuous use in addition to the standard squeeze button. Gold Plated Leads!-improves the electrical contact with the battery and also protects the Photon light from corrosion. Incredibly tough Glass-filled Polyurethane construction. Weight only 7 gm. 12 hour run time. 4.5 lumen output. Replaceable long life lithium battery included. USA