CATEYE OHR-31 Optical Heart Rate Sensor – Bluetooth/ANT+, USB Rechargeable Armband HR Monitor for Road, MTB & Gravel Cycling, 24 Hour Battery Life, IPX7 Waterproof, Fitness/Smartphone App Compatible

Subsequent Era Wrist Watch fashion Twin-band Bluetooth and ANT+ Optical Coronary heart Price Sensor that makes the older cumbersome coronary heart fee chest straps a factor of the previous.
OPTICAL HEART RATE SENSOR: Compact wrist watch fashion Optical LED primarily based coronary heart fee sensor.
DUAL BAND: Bluetooth 5.0 / ANT+ seamlessly connects to biking computer systems and smartphone apps, together with Cateye Biking.
USB RECHARGEABLE: USB rechargeable with as much as 24 hours of run-time.
IPX7 WATERPROOF: IPX7 rated to resist the weather.
POWER SAVING DESIGN: LED low battery indicator and auto shutdown mode maximizes the battery life between expenses.
UNIVERSAL FIT: Consists of a number of armband measurement choices to make sure correct match.
DIMENSIONS/WEIGHT: 1-49/64″ x 1-19/64″ x 15/32″ (45 × 33 ×12 mm) / 0.39 oz (11 g) (Excluding the arm band).