Unleashing Max Boost or its varying modes was never more easy as riders now have the ability to control both headlight and taillight with a flick of the thumb. (Taillight sold separately) Additional features include an 8-Step Fuel Gauge and a highly durable light housing with Dupont® Fiberglass reinforced nylon meeting all required FL1 Standards for impact testing and dust/water resistance. Features: 650 Lumens on High Mode MAX Lumen Output: 2000 on Boost Mode. MAX power requires MAX energy, use only when you need it most 8 Modes with Run Times: 0:45 – 21:00hrs Choose from 5 solid brightness levels and 3 multiple flash patterns Charge Time: 3:00hrs Weight: 216g Battery: Li-Ion 8 Step Fuel Gauge Water / Dust Resistant IP64 Rated. Lock Mode, perfect for use during storage and transporting the light. Press and hold power button for 8-10 seconds to lock out operation of light. Pairs with NiteRider® NiteLink™ BLE Short Range Wireless devices Run Times: Low - 7:30h at 200 Lumens Med - 4:00h at 325 Lumens High - 2:00h at 650 Lumens Boost - Up to 0:45min at 2000 Lumens Walk Mode - 21:00h at 50 Lumens Super Flash - 11:30h Pulse Flash - 14:30h Fast Flash - 10:00h