Features: Lightweight, compact and engineered to withstand conditions and use Attaches to cap for Party Christmas 100Pcs/lot, hands-free light source available This LED cap light is good design for the most practial, jogging (use the flashing mode), camping, hiking and anytime you need bright illumination 5 bright LEDS ON / OFF switch 2 modes: 5 LED light, 5 LED flash Power supply: 2* CR2032 cell batteries ( included) Put 2 pcs CR2032 cell batteries, it can last for biking The life of LED is more then 10,000 hours Specifications: Color: black Dimension: 82*58*22mm Weight: 29g (include batteries) Package size: 172*124*30mm Package weight: 50g Package include: 1* 5 LED cap light 2* CR2032 cell batteries