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Ships within 48 hours · Estimated delivery Sep 11 - Sep 16
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Description
ROCKBROS BICYCLE - Smart TAIL LED LIGHT USB Rechargeable Waterproof - 5 Light ModesFor those who love smart tech, our ROCKBROS Smart Bike Brake & Tail Light Q4 is the ideal way to illuminate and keep you safe when riding at night and show other road users when you're braking. With an in built sensor, this light comes on when you hit your brakes. It installs to your saddle easily and is made from a rugged aluminum alloy. Key Features: Bright red LED light with brake light smart tech The brake light illuminates automatically when you
For those who love smart tech, our ROCKBROS Smart Bike Brake & Tail Light Q4 is the ideal way to illuminate and keep you safe when riding at night and show other road users when you're braking. With an in-built sensor, this light comes on when you hit your brakes. It installs to your saddle easily and is made from a rugged aluminum alloy.
Key Features:
- Bright red LED light with brake light smart tech
- The brake light illuminates automatically when you brake
- Five main light modes - red slow flashing / red/blue/purple breathing / red/blue/purple flash / red constant
- Three light modes for different daytime conditions - low / medium / high
- Compact and durable - perfect for the toughest of rides
- Installs quickly to the saddle or seat post of your bike
- Waterproof - keeps the rain off in wet riding conditions
- USB rechargeable battery
Bright Brake Light
The ROCKBROS Smart Bike Brake & Tail Light Q4 is perfect for your daily ride. It shows other road users you and your bike clearly from behind and lights up brighter when you brake—signaling to drivers and other road users of your braking intentions. It fits your saddle or seat post and is compact and rugged for even the most demanding bike rides.Smart Brake Technology
Fitted with a sensor, the ROCKBROS Bicycle Smart rear light detects vibrations when you brake. The light brightens on braking, much like a car brake light, so other road users know your intentions.Different Light Modes
The ROCKBROS Smart Bike Brake & Tail Light Q4 brightens when you brake and arrives with five light modes. Have it read slow flashing, red, blue, purple breathing, red, blue, and purple flash or red constant, depending on your riding conditions.What's more, whatever mode you are on, the brake light illuminates when you brake—giving the ultimate rear light for safer nighttime cycling.Secure Saddle & Seatpost FittingThis rear bicycle light can be quickly and easily installed onto your saddle or seat post, whatever your preference. It's also waterproof for rain raiding and is constructed from a rugged aluminum alloy. When you've finished riding for the day, connect it to a USB and recharge the battery. Ready for your next adventure?
ROCKBROS Smart Bike Brake & Tail Light Q4 Specifications:
- Brand: ROCKBROS
- Model: Q4
- Type: Rear bicycle light with brake light smart tech
- Colour: Black
- Light Colour: Red/blue/purple
- Modes: red slow flashing / red/blue/purple breathing / red/blue/purple flash / red constant
- Light modes: low/medium/high
- Battery: USB Rechargeable
- Waterproof: IPX6
- Material: ABS plastic
- Weight: 23g
- Size (H x W x D): 30 x 38 x 29 mm
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 5
Wears well. True to size. Great quality.
Size: Medium, Color: Duffle Bag Green
Excellent weight and a phenomenal price. Quality is exceptional. Hubby says it's comfy. Fits true to size.
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Customer Favorite for Comfort & Everyday Wear
Size: 4X-Large, Color: Safety Green, Size: 4X-Large, Color: Safety Green
I absolutely love the Fruit of the Loom Men’s Eversoft Fleece Crewneck Sweatshirts! These have quickly become a staple in our store because they deliver exactly what our customers want — comfort, durability, and a clean, classic look.
The fleece is incredibly soft on the inside without being too heavy, which makes it perfect for everyday wear, layering, or working outdoors. One thing I really appreciate is how breathable and moisture-wicking the fabric is. Even after hours of wear, it still feels comfortable and not overly hot, which is important for active days or changing temperatures.
The fit is true to size and the extended sizes up to 4X are a huge plus. It’s not always easy to find quality sweatshirts in larger sizes that still look good and hold their shape, but these definitely do. They wash well, keep their softness, and maintain their color without shrinking or fading.
If you’re looking for a dependable, comfortable sweatshirt that looks great and feels even better, this is a solid choice. Whether for casual wear, work, or relaxing, you really can’t go wrong with this one.
Highly recommend!
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Reviewed in the United States on February 18, 2026
★★★★★ 4
Nice material, quality, comfortable
Size: X-Large, Color: Safety Green
Nice quality, soft. He likes it! It does run a bit big in the shoulder, but overall he likes the fit. Would purchase this one again.
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Reviewed in the United States on March 4, 2026
★★★★★ 5
Super Comfortable Crewneck
Size: Medium, Color: Grey Heather
This has become the sweatshirt that somehow disappears from the closet first.
The fleece is soft without feeling overly heavy, and the fabric has a bit of breathability so it stays comfortable for everyday wear. It works well as a simple layer for cooler days or lounging.
The fit is relaxed and the crewneck style is easy to throw on over a T shirt.
One of those straightforward sweatshirts that quietly ends up getting worn a lot.
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Reviewed in the United States on March 5, 2026
★★★★★ 5
Cozy and soft
Size: 4X-Large, Color: Red
This brand of sweatshirt is true to color and size. I find it is cozy and well made. It has some stretch and give but only enough to be comfortable, not so much that it looks weird.
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Reviewed in the United States on May 18, 2026