Garmin Varia RTL510 Rearview Bike Radar
DescriptionMounted neatly on the seatpost, it provides alerts for vehicles approaching from behind up to 153 yards (140 meters) away. Plus, the bright tail light is visible in daylight from up to a mile away, so you can see and be seen, day or night, on any ride.
Physical & performance 
Dimensions3.9” x 0.8” x 1.6" (98.6 x 19.7 x 39.6 mm)
Display size
Display resolution
Touchscreen
Color display
Weight71.0 g
Battery
Battery life6 hours solid, 6 hours night flash, 15 hours day flash
Water ratingIPX7
GPS enabled
GLONASS
Maps & memory 
Maps and routes
Ability to add maps
Accepts data cards
Sensors 
ANT+ cadence/speed
ANT+ heart rate strap
ANT+ power meter
ANT+ Trainer Control (FE-C)
Bluetooth smart heart rate strap
Bluetooth smart cadence / speed
Bluetooth smart power meter
Features 
Power meter compatible
Recording interval
Virtual partner
Biometric altimeter
Compass
Electronic gear shift display
Live tracking
Strava live segments
Temperature display
Display GPS & sensor data
Shock resistant
Wireless connection
Smart notifications
Automatic sync
OtherModes: solid, night flash, day flash
Lumens: 20 solid, 29 night flash, 65 day flash
ANT+®: Yes
Viewing angle: 220°
Links 
Affiliate link*Garmin
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