Light source : 2 x SST40 15W LEDs, one focused and one wide angle that can be used individually or in tandem     Power output: 1300 lumen each LED     Burn time: 2,5h on full power; up to 40h on low setting     Battery: 1x 18650 or 1x 27000     Charger : Built in charger using USB-C      Depth rating: 150m     Weight in air without battery: 9 3g     On/Off: Switch to turn on and step through the light modes.     Operating: Press and hold again to turn off. The light will remember the last setting when turned back on     3/8 thread on bottom of housing    Package includes:       Eridani Light      1x 18650 rechargeable battery      Holding bracket which may be used for goodman handle or helmet mount     Silicone head strap      Soft goodman handle