Selling Point 1. This heart rate belt has two link modes: Bluetooth and ant+ protocol! Applicable to various GPS code tables: Bai Rui Teng 310 330 405 530, igs50 igs618, Blackbird BB10S, Xingzhefeng, Xingzhe G+, and other ANT+ code table devices, also suitable for use All kinds of sports watch triathlon watches in ANT+ mode! Mobile Riding APP: Walker, Blackbird, Riding Notes, Tulips, Gudong, Happy Running Circle and more! Rowing machine, Bluetooth watch: Jia Ming, Song Tuo and so on! 2. Running, cycling, fitness, mountaineering, yoga and other sports can detect your heart rate output in real time through auxiliary equipment! Let you have a healthy exercise! 3. The adjustable chest strap is easy to install and use. The finely woven elastic strap is soft, durable and lightweight. The inner layer protects the sensor from moisture to ensure accurate measurement 4. Made of durable and wear-resistant materials, it will not crack, crack or tear. IP67 water resistance means that you can use this heart rate sensor in the rain, but not swimming. 5. Replaceable batteries can be used continuously for 1000 hours. You can replace the battery with CR2032 battery Parameter: Package weight: 67.3g Packing size: 8.5*3.5*11.7cm Host size: 61.9*34.3*10mm Chest strap size: 64-86cm Package: Heart rate belt*1 Note: There may be color differences due to different monitor resolutions. Due to manual measurement, size errors may occur.