Esaytool Smart Brake Sensing Bike Tail Light, Saddle & Seatpost Mount Bicycle Rear Light for Night Riding, 220 Degree Visibility, 4 Modes, Auto On/Off, 600 mAh USB-C Rechargeable, IPX6 Waterproof

Esaytool Smart Brake Sensing Bike Tail Light, Saddle & Seatpost Mount Bicycle Rear Light for Night Riding, 220 Degree Visibility, 4 Modes, Auto On/Off, 600 mAh USB-C Rechargeable, IPX6 Waterproof

• 4 Lighting Modes: Press the power button to cycle through Slow Flash (70h), Pulse (39h), Fast Flash (58h), and Steady (15h). Long-press to power off — the light automatically restores your last-used mode on startup. With a 220° wide beam covering rear and side areas, it ensures safer rides.
• 2 Mounting Options: Comes with both a saddle rail bracket and a seatpost bracket, requiring no tools. The saddle rail mount uses two zip ties, while the seatpost mount features an adjustable silicone strap. Flexible positioning adapts to your riding style.
• 600mAh USB-C Charging: The tail light equipped with a high-capacity lithium battery to ensure a reliable finish for every ride. Additionally, the power button features a built-in LED indicator. During operation: solid green indicates 100%-20% battery, solid red indicates 20%-10%, and flashing red means below 10%, recharge promptly. While charging, the LED blinks green and turns off once fully charged.
• Brake Sensing: All four lighting modes feature a smart brake-sensing system. When the bike slows down or brakes suddenly, the tail light automatically increases brightness for 2 seconds to alert vehicles and pedestrians behind before seamlessly returning to its previous mode.
• Auto ON/OFF Mode: Slow flash and pulse modes include smart sensing to detect ambient light and motion, auto-off in daylight and auto-on at night. If idle for 30 seconds at night, the light shuts off but reactivates when riding resumes. (This auto feature cannot be disabled. you can choose fast flash and steady modes as a daily riding choice.)