SERFAS Cosmo 15 Lumen 3 LED Tail Light closeout PolyX Breaker features an extremely

PolyX Breaker features an extremely resistant polyester fiber that's woven tightly crosswise

Not recommended for rear-wheel use

Great for most hybrids with a 6/7/8 speed freewheel

Ergonomic thumb control design ensures accurate pressure release

Specifically designed for E-bike

SERFAS Cosmo 15 Lumen 3 LED Tail Light closeout PolyX Breaker features an extremelyFeatures: 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