Helmet-Attachable Tail Light (20 Lumens) For the slimmest and most lightweight helmet-attachable tail light why would you look further than the GIANT NUMEN ALUMBRA 20lm REAR LIGHT.

Quick Magnet Mount Design It's designed to integrate seamlessly with compatible Giant and Liv helmets and features a unique quick magnet mount design for easy on and off. The GIANT NUMEN ALUMBRA REAR LIGHT is compatible with Rev Comp, Compel, Roost, Strive, Lanza, Coveta, Rev Liv Comp and Luta series helmets.

Rechargeable Battery With Reliable Run Times The GIANT NUMEN ALUMBRA 20lm REAR LIGHT is powered by a rechargeable Lithium-Ion polymer battery (250mAh) and has a built-in low-power indicator to provide advance warning of remaining run-time when the battery is getting low on power. Runtimes: High 2.5hrs (20LM), Low 6hrs (10LM), High Flash 7hrs (20LM), Low Flash 24hrs (5LM).