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We offer a 14-day hassle-free return and exchange policy starting from the date you receive your item. To be eligible, products must be unworn, unused, with tags attached, in original packaging, and accompanied by proof of purchase. If the item is defective, damaged, or incorrect, we cover the return shipping cost; for size or personal preference returns, the customer is responsible for shipping fees. Please inspect your order within 72 hours and contact us for any issues.Have a 14-day no-questions-asked return right. Refunds will be processed within 10 business days after we receive and inspect your return. Please contact customer service before returning items and send returns to the designated address; unauthorized returns will not be accepted. For questions, email service@rockbrossport.co.uk
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Light up your ride with the ROCKBROS Q4 Smart Bike Rear Light! This waterproof LED light is not only rechargeable via USB, but also serves as a smart brake light with 5 fixed and flashing modes. Stay safe on your bike with this bright and versatile light.


Rugged LED Light
Features 5 beads of COB type LED lamp, the light is bright and soft. The taillight is made of ABS and PC, which is lightweight, durable, anti-impact and corrosion resistant.
5 Light Modes
4 flashing modes: slow flash in red light, very fast flash in red light, breathing mode in 3 colors alternating and very fast flash in 3 colors alternating. 1 fixed mode: always on mode in red light. The light intensity is adjustable with 3 levels: low, medium and high.
Intelligent Detection System
Equipped with brake and vibration detection. They always light up for about 3 seconds to warn the vehicles behind when braking the bike.
260 mAh Battery
Rechargeable via usb. The rear light battery charging time is 2 hours. In addition, the light has the charge indicator in blue light. The duration is from 7 to 54 hours depending on the intensity of the light.
Waterproof and Easy to Install
Waterproof with an IPX6 rating. Easy to assemble and disassemble the light, without the need for tools. It can be installed under the bicycle seat or on the seat post.
| Brand | ROCKBROS |
| Material | Acrylonitrile Butadiene Styrene + Polycarbonate |
| Weight | Approx. 29 g (including saddle bracket) |
| Size | Approx. 30x38x25 mm |
| Battery | 3.7V 260mAh |
| Charging port | Type-C |
| Mode | 5 light modes |
| Waterproof | IPX6 |


Light up your ride with the ROCKBROS Q4 Smart Bike Rear Light! This waterproof LED light is not only rechargeable via USB, but also serves as a smart brake light with 5 fixed and flashing modes. Stay safe on your bike with this bright and versatile light.


Rugged LED Light
Features 5 beads of COB type LED lamp, the light is bright and soft. The taillight is made of ABS and PC, which is lightweight, durable, anti-impact and corrosion resistant.
5 Light Modes
4 flashing modes: slow flash in red light, very fast flash in red light, breathing mode in 3 colors alternating and very fast flash in 3 colors alternating. 1 fixed mode: always on mode in red light. The light intensity is adjustable with 3 levels: low, medium and high.
Intelligent Detection System
Equipped with brake and vibration detection. They always light up for about 3 seconds to warn the vehicles behind when braking the bike.
260 mAh Battery
Rechargeable via usb. The rear light battery charging time is 2 hours. In addition, the light has the charge indicator in blue light. The duration is from 7 to 54 hours depending on the intensity of the light.
Waterproof and Easy to Install
Waterproof with an IPX6 rating. Easy to assemble and disassemble the light, without the need for tools. It can be installed under the bicycle seat or on the seat post.
| Brand | ROCKBROS |
| Material | Acrylonitrile Butadiene Styrene + Polycarbonate |
| Weight | Approx. 29 g (including saddle bracket) |
| Size | Approx. 30x38x25 mm |
| Battery | 3.7V 260mAh |
| Charging port | Type-C |
| Mode | 5 light modes |
| Waterproof | IPX6 |
