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.features650 lumens on high modemax lumen output 2000 on boost mode. Max power requires max energy, use only when you need it most8 modes with run times 045 – 2100hrschoose from 5 solid brightness levels and 3 multiple flash patternscharge time 300hrsweight 216gbattery li ion8 step fuel gaugewater 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 devicesrun timeslow 730h at 200 lumensmed 400h at 325 lumenshigh 200h at 650 lumensboost up to 045min at 2000 lumenswalk mode 2100h at 50 lumenssuper flash 1130hpulse flash 1430hfast flash 1000hplease note all niterider products ship with a uk only plug adaptor