This LED cap light is good design for biking, jogging (use the flashing mode), camping, hiking and anytime you need bright illuminationLightweight, compact and engineered to withstand extreme conditions and use Attaches to cap for the most practial, handsfree light source available 5 Ultra bright LEDS ON / OFF switch 2 modes: 5 LED light, 5 LED flash Power supply: 2* CR2016 cell batteries ( included) Put 2 pcs CR2016 cell batteries, it can last for approx 48 hours The life of LED is more then 10,000 hours 

Specification: 

Color: black

Item size: 85*60*20mm 

Package size: 172*124*30mm 

Weight: 54g (include batteries) Package weight: 65g