The COOSPO TR70 Smart Radar Tail Light offers good radar functionality and battery life at half the price of competitors, but has notable accuracy issues including false positives and detection limitations.
Pros
- Excellent battery life (lasted about 19.5 hours in day flash mode)
- High brightness (comparable or slightly higher than Garmin Varia RTL515)
- Good side visibility
- Auto sleep feature extends battery life during stops
Cons
- Gives about 3 false positives per hour of riding
- Signal sometimes reflects from cars driving opposite direction or traffic signs
- Accuracy lags behind established Varia radars
- Maximum detection speed of 128 km/h (79mph) misses faster cars
Key Facts
- Weight: 64g
- Dimensions: 96×39×23 mm
- Detecting distance: 140m
Reviews & Ratings
The reviewer states that the COOSPO TR70 Smart Radar Tail Light is the best performer among the four radars tested, with significant improvements over the original version, but still has notable usability issues.
AI Summary
Pros
- No false positives recorded during testing
- Radar functionality works well in perfect conditions
- Approaching speed is reported accurately
- Multiple vehicles are detected well
- Some detections at or just beyond 140m range
- Didn't scare the reviewer when riding compared to other units
- Company improved the product based on feedback
Cons
- Unit is 'chirpy' with two beeps for single detections (orange then red alerts)
- Orange-to-red alert transition isn't configurable on the unit
- Continual beeps became annoying and caused the reviewer to start ignoring them
- Consumer confusion between old and new TR70 versions
- Requires new hardware for updates (not just firmware)
The reviewer tested the Coospo TR70 Smart Radar Tail Light and found it to be a cheap Chinese radar with good battery life and brightness, but with significant accuracy issues including about 3 false positives per hour. They note it doesn't match the reliability of established brands like Garmin Varia.
AI Summary
Pros
- Excellent battery life (lasted about 19.5 hours in day flash mode)
- High brightness (comparable or slightly higher than Garmin Varia RTL515)
- Good side visibility
- Auto sleep feature extends battery life during stops
- Brake sensing feature
- Changes light pattern during entire overtaking period
- Light modes are slightly customizable
- Safety tether included
- Battery life indicator
- USB-C charging port
- App can replace a bike computer by showing cars
- Detects multiple cars accurately, especially in bends
- Mount was secure and didn't slide on aero seatpost
Cons
- Gives about 3 false positives per hour of riding
- Signal sometimes reflects from cars driving opposite direction or traffic signs
- Accuracy lags behind established Varia radars
- Maximum detection speed of 128 km/h (79mph) misses faster cars
- Doesn't meet claimed 30-hour battery life (only 19.5 hours)
- Mount socket is incompatible with Garmin quarter-turn mount (rotated 90°)
- First unit had issues requiring factory mode reset with untrusted app
- Light flickers several times per second (visible only through camera)
Where to Buy
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