The Nathan RX Hyperbrite Strobe Rechargeable LED Clip Light is an easy and lightweight way to be seen and be safe during your walks and runs in the dark. This is Nathan’s brightest strobe light, putting out more than 16 Lumens with varying LED light modes. Clip the Nathan RX Hyperbrite onto your shoe laces, hat, dog leash, belt or hydration pack to instantly light up your nighttime runs and walks. Details Packed with 4 Bright LEDs casting 16+ Lumens Bright light in rain or snow IPX4 - Weather-resistant Securely clip to a shirt, hat, dog collar or anywhere else Long-lasting battery that can be recharged with Micro USB Lighting Modes: Steady On - 4+ Hours, Strobe - 6+ Hours, Alternating - 12+ Hours, Chain - 30+ Hours Prop 65 Warning