USB-C Rechargeable Bike Tail Lights, Rear Bike Lights with Auto Group-Sync IPX6 Waterproof Bicycle Tail Lights Seat Post-Mounted Rear Bike Lights 5 Mode Night & Daytime for Road Urban Cyclist

SMART DAYTIME MODE FOR ENHANCED VISIBILITY - The tail light features an optillumin lens that provides up to 50 lumens of light output. Its smart daytime mode increases visibility both at night and during the day., INTELLIGENT AMBIENT LIGHT SENSOR - This bike tail light comes with an ambient light sensor that automatically adjusts brightness according to environmental conditions. This ensures optimal visibility for the rider, enhancing safety in traffic., AUTO GROUP-SYNC TECHNOLOGY FOR TEAM RIDES - The LIGHT is equipped with a group ride mode featuring auto-sync technology. When activated, it automatically synchronizes the flashing patterns of multiple lights., USB-C RECHARGEABLE & WATER-RESISTANT - Charge quickly with the USB-C port, achieving full charge in just 1.5 hours and enjoying up to 30.5 hours of runtime. With its IPX6 waterproof rating, the light resists water from any direction., USER-FRIENDLY DESIGN - The tail light offers one-touch control with 5 different modes and an intuitive battery indicator for easy monitoring.