Garmin Vivosmart HR+ activity tracker and GPS watch.
About 2 years old, battery life still good (~5 days between charges if not using GPS). Some scuffs on screen that don’t affect use.
Original strap broke, has a 3rd party one fitted at the moment but I’ll include the original as I think Garmin offer free replacement, or they’re about £10 from Amazon.
Mostly used as a daily fitness tracker but also works well as a running watch with GPS, cadence, lap timers etc. No cycling specific features but it will log your route which can be set as a ride in the Connect app or Strava, or work as a HR sensor for an Edge.
Has some basic smartwatch features with notifications, weather and music control.
£40 posted in UK.