. Five bright LEDs deliver great brightness with impressive runtime. New Omni Directional Technology increases safety while three modes – rapid, flashing and constant, let you select the right level of visibility. With two AAA batteries, the Omni 5 will run up to 120 hours. The simple, tool-free FlexTight bracket and included clothing clip allow you to easily attach the Omni 5 anywhere you’d like Features: . Dimension: 36.0 x 75.0 x 21 9mm Weight: 41 8g (light unit and battery) Light source: White LED X5 Battery: AAA alkaline battery X2 Runtime: Approx. 40hrs in constant, 120hrs in flashing, and 40hrs in rapid mode Mount Size: φ22.2～32 0mm (FlexTight SP-12-F) Other: Clothing clip includedBuy Cateye Accessories from Chain Reaction Cycles, the World’s Largest Online Bike Store.