SERFAS Cosmo 15 Lumen 3 LED Tail Light closeout Regular test wins confirm the

Regular test wins confirm the measureable and noticeable advantages for the cyclist

The relatively large flywheel generates a realistic ride feel

Ergonomic thumb control design ensures accurate pressure release

Presta and Schrader compatible

OT-SP41 reduces inner cable friction to provide quick response to operations and effortless shifting

SERFAS Cosmo 15 Lumen 3 LED Tail Light closeout Regular test wins confirm theFeatures: 3 LED Design for Easy Visibility Triple 5 Lumen LEDs IPX3 Waterproof Charges from Dead to Fully Charge in 2 hours Last Mode Memory USB Charging Specs: Solid Modes: High (15 Lumens): 2 hrs Low (7 Lumens): 4. 5 hrs Flash Modes: KITT Flash (5 Lumens): 14. 5 hrs Flash (15 Lumens): 4 hrs Weight: 56 Grams with Bracket Battery: Lithium Polymer