![Polar H10 Heart Rate Sensor Black With 5 kHz Transmission Frequency & User Replaceable Battery-XS/S - Newegg.com Polar H10 Heart Rate Sensor Black With 5 kHz Transmission Frequency & User Replaceable Battery-XS/S - Newegg.com](https://c1.neweggimages.com/ProductImage/A11V_1_201706141659370234.jpg)
Polar H10 Heart Rate Sensor Black With 5 kHz Transmission Frequency & User Replaceable Battery-XS/S - Newegg.com
![Amazon.com: Polar T34 Transmitter HR Chest Strap by Kettler Fitness (Model 392027802) : Sports & Outdoors Amazon.com: Polar T34 Transmitter HR Chest Strap by Kettler Fitness (Model 392027802) : Sports & Outdoors](https://m.media-amazon.com/images/I/61gkjkqJQoS._AC_SS450_.jpg)
Amazon.com: Polar T34 Transmitter HR Chest Strap by Kettler Fitness (Model 392027802) : Sports & Outdoors
![Wearable radio-frequency sensing of respiratory rate, respiratory volume, and heart rate | npj Digital Medicine Wearable radio-frequency sensing of respiratory rate, respiratory volume, and heart rate | npj Digital Medicine](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41746-020-0307-6/MediaObjects/41746_2020_307_Fig1_HTML.png)
Wearable radio-frequency sensing of respiratory rate, respiratory volume, and heart rate | npj Digital Medicine
![Frequency transmitter | RS485 transmitter | sensor signal conditioner | 35 mm DIN rail | Laurel Electronics Inc Frequency transmitter | RS485 transmitter | sensor signal conditioner | 35 mm DIN rail | Laurel Electronics Inc](https://www.laurels.com/images_tx2/transmitter.jpg)