SecurityIng&reg; 4 Modes Waterproof 2300 Lumens XM-L U2 LED Bicycle Light Cool White Rotatable Bike Light LED Lighting Lamp with 8.4V 4400mAh Rechargeable Li-ion Battery Pack & Charger Adopts the latest US Cree XM-L U2 LED, its brightness can be up to 2300LM. Made of viation aluminum alloy, which is with Anode Oxidation Treatment & CNC Perfect Process, constant current circuit control, wear resistance, corrosion resistance, durable. Use the dedicated euramerican style lens, unique reflective cup design. High reflection efficiency and more perfect floodlight effect. With Special sealing O-ring device and waterproof design, it can be used in rainy days. It comes with a head band, means the bike light can also be used as a headlamp.