Newest Technology Bright Lighting 4-Pin Plug-In PID thermal regulated outputs (1020Lm and 620Lm) Battery: One 18650 size (up to 69mm long) 3.6/3.7V li-ion rechargeable. Batteries are not included Automatic stepping down from High to Medium, and from Medium to Low when battery capacity is low Weight: 1.5oz (43 gram) Beam Type: 120 degree flood