The newest Nathan runners' light is also the most versatile! The lightweight & powerful 250-lumen Luna Fire 250 RX Chest/Waist Light features a comfortable strap for secure placement on your chest or waist, plus you can easily adjust the beam angle up and down. As an added bonus, you can remove the light and clip onto your running shorts, jacket, hydration pack...anywhere, really...to customize the exact placement and beam angle of light. Those once-scary night time roads, paths and trails won't know what hit them Product Highlights Lightweight, versatile runners' chest/waist light 250 Lumens LED spotlight Includes a comfortable chest/waist strap Removable light clips on anywhere Battery: Lithium-ion Polymer Rechargeable via USB Burn Time: 25+ Hours Water Resistance: IPX4 – Weather resistant Product Details 33 Lumens ( Low) 100 Lumens (Med) 200 Lumens (Hi) 250 Lumens (Boost) 100 Lumens (White/Strobe)