Super bright, glasses lenses and aluminum shell with aviation and army regulations three hard oxidation. 1000mAh constant current. Three working modes: 100% brightness, 50% brightness and SOS flashing. Luminous flux: 900 lumens Light source: SSCP7C-SXO. LED life span: 50000 hours. Battery : 4*8.4V 2500mAh battery (included). Come with an adjustable head strap for convenient use. Come with a 100-240V flat plug charger. Come with two rubber rings for good fastening. Discharge time: 180 minutes (100% brightness). Great for bicycle use.