The standard issue military Mic Lite or Lip Lite is compatible with all night vision goggles and devices. Can be used on the standard M-87 or the M-162 Tempest microphone, or other like microphone, on a helmet or headset. A slight push on the switch (with the lip or tongue) causes momentary light, while a further push keeps the light on until another push turns the light off. Uses 2 AA-cell batteries.