3-color LED light source: Front light CREE white light, high brightness 200LM, medium brightness 65LM Side light CREE red light, 43LM Ultraviolet 365nm, 15700μw@15cm Dual switch: Front switch controls white light Rear switch controls red light and ultraviolet light High elastic stainless steel clamp Use 2AAA batteries Dimensions: length: 151.7mm, lamp head diameter 17.1mm Surface treatment: hard anodized