Adjustable far light and short light, adjustable sleepless (5%-100% brightnes). 250 hours run-time at low lighting mode. Three working modes: two little lights are lighting; one big little are lighting; three lights are lighting. Luminous flux: 1400 lumens at high lighting mode. Light source: 1*SSCP7 bulb, 2*XP-E bulb. LED life span: 50000 hours. Voltage: 6.0-18V. Battery : 2*8.4V 18650 rechargeable battery (included). Come with a 100-240V flat plug charger. Come with three rubber rings for good fastening. Great for bicycle use.