Bulb: COB LED + Toshiba LED

Battery: 1 x 18650 Li-ion

Function: 100%-30%-1W

Max output: 300 Lumens (COB) ; 50 Lumens (LED TOP)

Run time: 2.5 hours (COB) ; 24 hours (LED TOP)

Beam distance: 20 meters ( COB) ; 8 meters (LED TOP)

Recharger : 5V 1A (USB port)

Waterproof Grade: IPX4

Size: Φ33.5 x Φ42 x 326mm

N.W.: 266.7g (including battery)

Constant current design. 

And there is low power indicator light. 

When the power is low , the light will turn red.