Power output is 2000 lumens (measured 1500 lumens)
6 different power levels
Pack includes either the 4 cell or 2 cell ES battery, quick bayonet fitting handlebar mount, helmet mount and head harness, and 1m extension cable
Backlit LED power button lets you know which power mode your using
ES Li-Ion battery pack with built in power gauge
2.25 hours run time on full power (using the 4 cell battery)
Improved LED's
Weight 426g (R4+ Headlamp and 4 cell ES battery)