RISK-FREE TRY - The bike back tail light will automatically turn off after 30 seconds when it detects no movement, and once it is touched or the bike is detected moving, the light will automatically turn on again. ROCKBROS offers you a 30-DAY money-back and 12-MONTH warranty, feel free to contact us if you have any questions. EASY TO INSTALL & VERSATILE - Say goodbye to tools, just mount the red rear light to the bike's saddle bracket or seatpost and secure with the cable ties or rubber bands. Additionally, it can be attached to wheelchairs, infant strollers, pet harnesses, children's bikes, backpacks, and etc. IPX6 WATERPROOF & ALUMINUM ALLOY SHELL - The bike tail lights made of CNC machined aluminum alloy shell is drop-proof and wear-resistant. IPX6 waterproof and dustproof makes bicycle taillights suitable for any harsh weather. LONG BATTERY LIFE - Our cycling safety light built-in safe and durable 300mAh USB rechargeable battery that can run for up to 30 hours on a full charge. The blue indicator light flashes quickly to remind charging, the blue light is always on when charging, and turns off when fully charged. 4 LIGHT MODES & SAFETY - ROCKBROS bike rear light has 4 different lights to switch: Flashing Mode, Breathing (Gradient Pulse) Mode, Strobe Mode, and Steady On Mode. When riding suddenly brakes or decelerates, the tail light will automatically switch to high-brightness mode to ensure safe riding and remind people behind.

International Protection Rating: IPX6. Auto Part Position: Rear. Number of settings: 4. Mounting Type: Seat Mount. Water Resistance Level: Waterproof. Power Source: Battery Powered. Material: Aluminum. Brand: ROCKBROS. Color: Black. Date First Available: April 2, 2022. Best Sellers Rank: #52,334 in Sports & Outdoors. Customer Reviews: 4.5 out of 5 stars 18 ratings 4.5 out of 5 stars. : B09X3391M8. Included Components: ?Seatpost bracket, USB charging cable, Saddle bracket, Rubber bands, Cable ties. Manufacturer: ?ROCKBROS. Material: ?Aluminum. Color: ?Black. Brand Name: ?ROCKBROS. Package Weight: ?0.5 Kilograms. Item Package Dimensions L x W x H: ?5.43 x 2.99 x 1.65 inches.