ROCKBROS Q4 Intelligent Brake Sensing Vibration Sensing Bicycle Tail Light Rear Bike Light IPX6 Waterproof Cycling Accessory • The bike's rear light has five modes to switch: 1. Red Slow Flash 2. Red Strobe Flash 3. Breathe Flash 4. Red/Blue/Purple Switching Strobe Flash 5. Red Steady On. Five modes for your choice, improve the safety of riding while also enhancing the fun, making you different in the crowd • Easy to install, no extra tools needed, can be easily taken with you so it doesn't get stolen • IPX6 waterproof design makes it work well even when caught in sudden rain, meets daily cycling needs; not recommended for prolonged soaking in water or liquid • ABS body, lightweight and compact, durable and anti-drop, PC optical lens and COB light beads keep the light bright and not dazzling • Vibration sensing design allows for automatically waking up the tail light and it will turn off after 30 seconds when sensing no vibration • With intelligent brake sensing, the taillight lights up during braking to warn vehicles from behind Specifications: • Brand: ROCKBROS • Model: Q4 • Material: ABS+PC • Waterproof grade: IPX6 • Lamp beads: COB lamp beads • Weight: 23g per piece • Modes: 5 lighting modes, 3 brightness adjustments • Battery life: High light 8-16 hours, medium light 15-30 hours, low light 25-50 hours Package included: • 1 x Tail Light • 1 x Bracket • 1 x Fastener Strap • 1 x User Manual • Other items not included