With a long lamp life and extended battery burn time, you won't be left in the dark with the L1. The polycarbonate body is resistant to chemicals, water and corrosion. The convenient tail switch for constant on/momentary is easy to operate. The L1 is perfect for close quarter use. Packaged with 4 LR 44 1.5V alkaline coin cells, a break-a-way safety lanyard, and colored lens discs to preserve night vision. This handy light offers a lot for its size.