Lamp Surgical 6.0V Vaccum Mod.02500. This headlight permits uniform illumination of a 1/2" spot at an 8" distance or a 6 1/2" spot at a 13" distance. A detachable connector controls the light`s power source. Headlight comes complete with headband and 6V transformer. Unit operates on 110 to 130V, 60 Hz, and is UL listed and CSA certified.