LEZYNE KTV Pro+ Ai Alert Rear Black Bicycle USB Rechargeable Tail Light (1-LED-35R-V304)

Advanced taillight with "Ai Alert" brake-sensing technology; Intelligently detects deceleration and changes output mode alerting others you're slowing down; Max 150 lumens or 20-hour runtime in Femto mode; 6 combined solid and flash output modes including Highly disruptive Day Flash mode; Lightweight and durable co-molded design; Wide Angle Optics provide 270 degrees of visibility; Aero and round seat post-compatible; Includes versatile silicone rubber mounting strap; Integrated rechargeable USB stick for cable-free recharging; Rigorously tested to IPX7 Waterproofing standards