Garmin Fenix 5S Multisport GPS Watch with Outdoor Navigation and Wrist-Based Heart Rate - Silver with Turquoise Band

Garmin Forerunner 35 GPS Running Watch with Wrist-Based Heart Rate and Workouts - Green (Limelight Green)

Apple Watch Series 3 (GPS + Cellular, 42mm) - Silver Aluminum Case with White Sport Band

POLAR Unisex's Vantage M Multisport Watch, White, M/L

Samsung Galaxy Watch 42mm - UK Version - Rose Gold

Polar Unisex A370 Sleek Fitness Tracker with Continuous Wrist-Based Heart Rate Plus Sleep Analysis and Training Features, Blue, Medium

Garmin 010-03717-70 Forerunner 235 Marsala Activity Tracker - Black

Apple Watch Series 4 (GPS + Cellular, 44mm) - Gold Stainless Steel Case with Gold Milanese Loop

Garmin Small/Medium vivosmart 4 Smart Activity Tracker with Wrist-Based Heart Rate and Fitness Monitoring Tools - Black

Samsung Galaxy Watch 46mm

Polar Unisex's Vantage V Multisport Watch, White, M/L

Fitbit Versa Special Edition Health & Fitness Smartwatch with Heart Rate, Music & Swim Tracking, Charcoal

Garmin Vivoactive 3 GPS Smartwatch with Built-In Sports Apps and Wrist Heart Rate, Gunmetal

Fitbit Ionic Health & Fitness Smartwatch (GPS) with Heart Rate, Swim Tracking & Music - Black (Charcoal)/Smoke Grey

POLAR Unisex's M600 Sports Watch Powered by Android Wear, White, Medium-Large

Polar Unisex M430 Gps Running Watch, Black, One Size

SUUNTO Spartan Sport (Wrist - Hr), Black

Fitbit Inspire HR Health & Fitness Tracker with Auto-Exercise Recognition, 5 Day Battery, Sleep & Swim Tracking, White/Black

Garmin Vivosport Smart Activity Tracker with Wrist-Based Heart Rate and GPS -Black (Limelight), Large

Garmin Vivofit 4 Activity Tracker - Black Speckled, Small/Medium

Apple Watch Series 4 (GPS + Cellular, 44mm) - Space Grey Aluminium Case with Black Sport Loop

POLAR Unisex's OH1 Heart Rate Sensor, Black, Medium/2X-Large

Fitbit Charge 3 NFC Special Edition Advanced Fitness Tracker with Heart Rate, Swim Tracking & 7 Day Battery - Rose-Gold/Lavender, One Size

Samsung Gear Sport Smartwatch - UK Version - Black

Garmin Vivosport Smart Activity Tracker with Wrist-Based Heart Rate and GPS - Pink (Fuchia), Small

Tacx Heart Rate Belt (Bluetooth/Ant+)

Garmin Premium Heart Rate Monitor Strap, Black, One Size

Apple Watch Nike+ Series 4 smartwatch Silver OLED Cellular GPS (satellite) Summit White Nike Sport Loop

Fitbit Inspire Health & Fitness Tracker with Auto-Exercise Recognition, 5 Day Battery, Sleep & Swim Tracking, Black

Lezyne Hr Flow Sensor Bike Pump Accessory, Black, One Size

Apple Watch Series 4 (GPS, 40mm) - Gold Aluminium Case with Pink Sand Sport Loop

Fitbit Versa Lite Health & Fitness Smartwatch with Heart Rate, 4+ Day Battery & Water Resistance, Mulberry