The for Computer Speedometer ANT+ Speed and Dual Sensor is a high-quality accessory for cyclists. It provides accurate speed and data, compatible with for , for , and for devices. The sensor is , ensuring it 't add unnecessary bulk to your bike. Stay on top of your cycling performance with this reliable ANT+ sensor. , high-quality. Product Name:Dual mode sensor for pedaling frequency and speed Model:S3+Speed/Tap Frequency Sensor Wireless interface:Bluetooth Smart, ANT+ Battery life:400h Waterproof performance:IP66 Operating temperature:-10℃-50℃ Battery Type:CR2032 Battery (Customers need to purchase it themselves, the product does not come with a battery) Colour:Black Material:Plastic Package Contents: 1 * sensor 1 * crank rubber ring 1 * crank silicone gasket 1 * flower drum rubber ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.