The Bigblue Green Spot Light delivers below 5 mW Green Laser with 520nM wavelength. The light works for 2xAAA alkaline or Ni-MH batteries and lasts up to 7 hrs burn time. 100 meter tested. Dia. 17 x L 114,1 mm. The light is suitable for diving and outdoor activities - hiking, running, camping, fishing etc. The sleek and ultra-compact aluminium body can withstand the most rugged diving situation. Lanyard included.