4AA batteries included. Maximum distance of 100-feet of visibility and 8 hours battery life. Wrist lanyard included. Reflective components and a white body make it easy to spot in dark water, and floats for easy retrieval.
PROFESSIONAL GRADE FILTERED 365nm. This is High Flux Density 365nm wavelength that professionals use. This is NOT to be confused with longer wave 395nm devices. Nor is it to be confused with unfiltered 365nm UV.