The M60C Panther features huge outputs coupled with the revolutionary Magnetic Control Ring interface. The M60C can be powered by 3 li-ion 18650 batteries or 6 lithium CR123A's. When using the rechargeable li-ion power sources, the M60C can be plugged directly into an optional charging base for fast and convenient power. Three advanced XM-L2 LEDs produce up to 2500 Lumens . Mode selection comes by way of SUNWAYMAN's brilliant Magnetic Control System (MCS). Twist the smooth rotator ring from left to right to select from 9 outputs including the 2 lumen firefly mode, the ultra-bright 2500 lumen turbo, an SOS function, and blinding strobe.