Note: The NiteRiderA(R) Lumina(TM) Dual 2000 is shipped from the factory in Travel Lock Mode. This mode feature is designed to save battery power by preventing the head light from accidentally turning on while in storage. Simply press and hold power button 8-10 seconds to lock / unlock. Its dual LED set-up puts out enough light at 2000 lumens to be more than capable navigating the toughest off-road terrain, while being nimble and versatile enough to tackle those long and arduous paved commutes. FEATURES a Lumen Output: 2000 a 7 Modes with Run Times: 1:00-21:30hrs a Charge Time: 3:30 hrs a Weight: 258g a Battery: Li-Iona Low Battery Indicatora USB-C Rechargeable a Boost Mode for Maximum LED Outputa Boost Mode indicator, power button will light up red and bluea Water / Dust Resistant IP64 Rated RUN TIMES*Low - 8:30h at 575 LumensMed - 4:30h at 950 LumensHigh - 2:30h at 1800 LumensBoost - 1:00h at 2000 LumensPulse Flash - 9:45h at 1800 LumensFast Flash - 17:30h at 1900 LumensWalk - 21:30h at 150 Lumens *Run times are approximations and may vary ! Warning Hot Surfaces !Do not use the Lumina(TM) as a hand-held lighting device when in high and boost modes!