Features 1.Wireless Connection: This bike computer supports wireless BT connection, suitable for iPhone for IOS6 or above, for Android 4.3 or above. 2.Data Recording: This bike speedometer can record route, time, cadence, and pedal speed, etc. Helping you improve your endurance and riding performance. 3.Battery Powered: This cycling computer is powered by CR2032 battery, up to 500 hours battery life. 4.IPX4 Waterproof: This bike odometer is made of premium ABS material, which is IPX4 waterproof and highly durable. 5.Mini Size: This wireless bike speedometer is light in weight and mini in size. It can be easily installed within 3 minutes. specificationItem Type: Wireless Bike Computer Material: ABS Technology: BT Low Power Consumption Technology Transmission Range: Less Than 3 Meters / 9.9ft Battery Type: Inbuilt 1 x 60mAh CR2032 Button Battery Compatible System: For IOS, For Android PackageList1 x Wireless Bike Computer 1 x Sensor 1 x Magnet 2 x Cable Ties 1 x Rubber Band 1 x User Manual