Fenix 6 to Forerunner 255 - wrist HR differences - fēnix 6 Series - Wearables - Garmin Forums
Garmin Forerunner 235 vs. 255 – LITPro
Garmin Forerunner 255 GPS Running Watch with Individual Training Plans, Special Running Functions and Detailed Training Analysis. 1.1" & 1.3" Colour Display, Battery Life up to 14 Days, Waterproof : Amazon.de: Sports