A Powerful Runner's 400-lumen lamp with a removable light clip and comfortable elastic strap, designed for wearers waist or chest. Run Longer: 400 Lumens of clear steady crisp light provides greater visibility of the road and path ahead, when running or jogging in low light conditions. Adjustable Comfort: sleek Runners Light with elastic comfort strap fits easily on your chest or waist or use the versatile clip to place on a pack, belt, or clothing. Features: 400 Lumens LED spotlight, Eco 10 lumens 30 hrs., Low 100 Lumen 4.3 hrs., Medium 250 Lumen 3.2 hrs., High 300 Lumen 2.15 hrs., Boost 400 Lumen 1.45 hrs., Strobe 200 Lumen 2.4 hrs. Removable and versatile light clip that features 4 different beam angles Eco LED level provides 30+ hours of burn time Li-Ion USB rechargeable battery, charge port is located on back of light C to A port recharge cord included IPX4 Weather-resistant Includes a soft comfortable elastic chest/waist strap Elastic Band Measurement: 22" to 55"