DM6C is available with AA alkaline or Ni-MH batteries. Bulb power: 2.5V, 1.6W; ... eye, especially the retina.Features:1. DM6C is available with AA alkaline or Ni-MH batteries. Bulb power: 2.5V, 1.6W ... , ±20DAperture: red-free filter, Large spot, small spot, hemispotRated voltage: AA alkaline or Ni-MH batteriesElectrical Safety Standard: GB9706.1, internal power ...