Exposure Joystick with Helmet Mount Bulb Type: Cree XPG R5 LEDPower Source: 2900mAh Lithium Ion batteryBackup Power Source: Battery Location: inside caseBatteries Included: yesVoltage Regulator: Modes: OMSBulbs: 1Lumens: 400Burn Time: 2 - 36 hoursWaterproof: no, weather-resistantWeight: 87 gRecommended Use: cyclingManufacturer Warranty: