Knog pop ii front lightwhat some love might not be so loved by others so instead of compromising knog have made 10x designs for three lights some are mild some are wild but the striking form does not outshine the excellent function super bright aa battery powered long runtimes replaceable straps and side illumination featuresmaterials pc abs plastic housing and polycarbonate lenslight output 60 lumensdimensions 75x38x25mmbattery 2x aa batteryrun time 104 hrs steadylow 150