Sony Mobile Smartband 2 tracker of activity for smartphone: Amazon.de: Sports & Outdoors
ViATOM Heart Rate Chest Strap, Heart Rate Monitor with Bluetooth and ANT+, Waterproof ECG Monitor, HRM-Run for Movement with Alarm : Amazon.de: Sports & Outdoors
ANBEST 22mm Nylon Armband für Garmin Fenix 7/Fenix 6 Pro/Fenix 5 Armband, Schleife Klettband für Fenix 7 Pro/Fenix 6/Epix 2/Forerunner 945/955/965/935 Ultraleichtes Ersatzarmband, Weiß: Amazon.de: Sport & Freizeit
Black Bluetooth Smart HRM Armband Heart Rate Fitness Tracker + TFA Schrittzähler | eBay