- Brand: COOSPO - Model, Color: H808S, Black - Type: Heart Rate Monitor - Included: Belt, Unused battery Connects via Bluetooth 4.0 or ANT+ Thank you for viewing. I used this with a Garmin Etrex 30X mounted on my road bike for about 2 years. The response was fast, and the battery life lasted for more than 3 months, using it for 1 hour every day (I removed one electrode after use). I stopped using it because I understood the relationship between tightness and heart rate, and it was a hassle to put on. The rubber band isn't too worn. If you're concerned, you can buy a replacement for 360 yen on AliE... Also, for those with a slender build and dry skin, the signal may be interrupted, so it's better to use cream. As a bonus, I'm including an unused CR2030 battery.