The USB rechargeable MacroStream is a compact personal light that fits in the palm of your hand or comfortably in your pocket and provides unparalleled performance for its size. Recharge by plugging into USB port, optional AC or DC adapter, or Streamlight's EPU-5200. Material lens Machined aluminum alloy case. Type II MIL-Spec anodized finish; unbreakable polycarbonate lens, White LED technology, impervious to shock with a 30, 000 hour lifetime and push button tail switch - momentary or constant on operation.