Features： 1、This bike wireless sensor is made of qualified plastic material, sturdy and water-resistant, rainproof and durable 2、It can collect speed and cadence, you can choose which one you need by pulling the toggle switch of the sensor 3、Connect it via bluetooth to your smartphone, compatible with many APPs of phone and suitable for many brands of bike computers 4、The sensor is very sensitive and ensures a non-stop and stable signal transmission, gives you a reliable data all the time 5、With mounting accessories for firm installation. Lightweight and easy to install, no extra tools required Specification： 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: and High Quality Material: Plastic Color: Black Bluetooth: 4.0 ANT+  Waterproof: IP67 Using Time: 600 hours Standby Time: 300 days Measuring Scope: 0-90km/h 0-200rpm Power Supply: 1 x Built-in CR2032 battery Size: Approx. 38 x 29.5 x 9.5mm / 1.5 x 1.2 x 0.4inch Weight: Approx. 32g Compatible Model: for Jiaming bairuiteng bicycle code meter Package Included: 1 x Bike Wireless Sensor 2 x Rubber Rings 2 x Rubber Pads 1 x User Manual Package List：