Speed Meter Digital Bike, Multifunction, Waterproof Sports Sensors, Bicycle. Features: Multi-function Raincoat LCD Odometer, Bike Ideal Partner. Imported Sensors to Provide Stable Performance, Wide Working Temperature. Four Columns Window Real-time Display the Current Speed, Travel Distance, Horseback Riding, Travel Time of the Calories They Consume, the Current Time and Date. Simple Maximum Speed, Average Speed, Total, Total Distance, the Current Temperature and Rotating Wheels Per Minute. Backlight Function, High Brightness Light Source Travel All Data Clearly Visible in the Night. Signs of Real-time Acceleration or Deceleration, Easy to Control Your Speed. Speeding Remind Safe to Ride a Bicycle. Bicycle Oil/maintenance Safety Remind Your Bike the Best Performance and Service Life. Low Battery Indicator for the Odometer Working Environment, You Know. 24 H, 12 H/kilometers/miles and Optional Celsius/Fahrenheit Temperature and Calendar. Stopwatch in the Inspection Data for You. Widely Used in the 4 ~ 40 "bicycle/electric Bicycle or a Motorcycle. Easy Installation and Rapid Release, Portable and Durable. Specifications: Material: ABS. Voltage: DC3V Battery: 1 * CR2032 Battery(No Battery Delivery) Working Temperature: - 10 to 60 Degrees Celsius Product Size: 5.5 * 4.5 * 4.5 Cm / 2.2 * 1.8 * 1.8 Goods Weight: 29 G / 1 Oz Packing List: 1 * Bicycle Odometer 1 * Mountain Cable Tie 1 * Round Magnet 1 * Rubber Gasket 1 X User Manual (English) .