1.20 main functions.2.Ideal for bicycle training and doing exercise.3.Lightweight and durable.4.Water-resistance， which can be used in the rainy day. Functions: 1.Current Speed2.Odometer3.Trip Distance4.Maximum Speed5.Average Speed6.Trip Time7.Clock/(12H/24H)8.Stopwatch9.Preset Time10.Maintenance Alter11.Calories12.SrttingG Type Circumference13.Cycle Show14.Comparator15.Setting km/inch16.Auto Back Light(Valid Time 16:00-8:00)17.Preset Distance18.Preset Calorise19.Auto Sleep20.Auto Wake Up Package includes: 1 * LCD Bicycle Computer1 * Sensor Transmitter1 * Mounting Shoe1 * Wheel Magnet1 * Set of Cable Ties1 * User Manual(English)