I looking at getting Garmin rear radar to link to my 520 plus on my country bike rides . There are 2 on the market
One for 129.00 at Clever Training
Garmin Varia 129.00
the other
Garmin Varia RTL510

Im not sure if any differnce in the 2 units expect looks and size ,
Should I get the cheaper unit ?
Thanks
Rick
Rick