Features: 350 Lumen White Samsung SMD LEDs. Dual power options - runs off rechargeable lithium battery or 3 x AAA alkaline batteries. 3M VHB adhesive helmet mount (included) Easy push button micro switch. Anti-dazzle retractable light shield. Fully adjustable non-slip silicone headband. 1800mAh Li-polymer direct micro-USB rechargeable battery pack. .(included). 3 x AAA battery case (included). Impact resistant to 1m. Network Rail Approved.