Front Light Powerful 550 lumens 5 modes: High Beam, Medium Beam, Low Beam, Flash, Pulse Flash Polymer body Side visibility for extra safety USB rechargeable lithium 3.7V/1800mAh USB C cable included Charging indicator Low battery indicator Water resistant: IPX4 Charge time: 4.5-5 hours Quick release tool free bracket Rear Light:Advanced COB (Chip On Board) LED light technology which is both brighter and energy/heat efficient than standard SMD (Surface Mounted Device) LED lights. Ursa features 50 chips COB (36 outer and 14 inner) to create a bright light beam. Polymer body Side visibility for extra safety USB C cable included Charging indicator Low battery indicator Water resistant: IPX4 Charge time: 2 hours