1. Can be equipped with two bicycles 2. Luminous 3. Automatically wake up 4. Temperature detection 5. Calorie consumption 6. Equipped with extension bracket 7. The regular functions of the stopwatch are available Product upgrade improvement 1.The rubber ring is changed to non-slip and will not stick to dust. 2.Reinforced magnet，Strengthen signal transmission 3.More colors backlight,now there are blue,red,green in the update style. Part B:How TO Use? Please make sure that the mounting direction of the sensor, point the battery cover side toward the magnet and keep it within 3 mm. Distance between Bike computer and Sensor within 60cm Functional selection Backlight Setting Time Setting Wheel Size Setting Global Setting Best Recommend