Features:This bike wireless sensor is made of qualified plastic material, sturdy and water-resistant, rainproof and durable.It can collect speed and cadence, you can choose which one you need by pulling the toggle switch of the sensor. Connect it via bluetooth to your smartphone, compatible with many APPs of phone and suitable for many brands of bike computers.The sensor is very sensitive and ensures a non-stop and stable signal transmission, gives you a reliable data all the time.With mounting accessories for firm installation. Lightweight and easy to install, no extra tools required. Specifications:Condition: 100% Brand New and High QualityMaterial: PlasticColor: BlackBluetooth: 4.0 ANT+ Waterproof: IP67Rated Voltage: 3VUsing Time: 600 hoursStandby Time: 300 daysMeasuring Scope: 0-90km/h 0-200rpmPower Supply: 1 x Built-in CR2032 batterySize: Approx. 38 x 29.5 x 9.5mm / 1.5 x 1.2 x 0.4inchWeight: Approx. 32gCompatible Model: for Jiaming bairuiteng bicycle code meterPackage Included:1 x Bike Wireless Sensor2 x Rubber Rings2 x Rubber Pads1 x User Manual.