Knog Gekko LED Front Light: Water-resistant, superslim, flexible silicone body, integrated clipping feature, quick-release mounting, directional LEDs. Low battery warning indicator. Visible up to 600 metres. Dimensions: 38 x 53 x 41 mm Weight: 53 grams (including batteries) 3 Ultra bright Leds 3 Functions Waterproof Silicon Body Tooless silicon strap mounting Visible to 600 m 2 x AAA Batteries (Included)