The lightweight HL32R-T Trail Running headlamp boasts 800 lumens from two spot and flood light LEDs with a 30% lighter magnesium body. It&';s powered by a rechargeable 1900mAh battery (included) or AAA batteries (not included), and has a USB Type C charging port, ensuring a quick 3-hour recharge. It offers up to 20 hours runtime and the smart stride sensor adjusts the brightness to match your running speed. Additionally, an SOS mode and reflective headband provide assistance should you need it. A perforated headband allows airflow and sweat evaporation for cooling, and the SPORT headband fit system allows for customized fit with just a twist. You can rest easy with the lockout function, plus the IP66 waterproofing, 2- meter drop and -31Adeg to 113Adeg fahrenheit operation ensures a durable, reliable headlamp for your trail runs.