Specifications: Type: Speed ​​odometer Size:4.5*4.5*2.0cm Material: Plastic ABS Color: black, silver Theme: Sports Sports Type: Cycling Display: LCD display Package Included: 1pc * bicycle speedometer+1pc * mounting block+1pc * transmitter sensor+4pcs * cable ties Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement Multi-functions with auto sleep and wake-up--wireless bike computer records with average speed, maximum speed, current speed mph/kph, riding time, odometer, clock, distance, scan, maintenance alert. Curved square shape body, quick-respond press buttons, exact modes display, you have all cycling data easily by this cycling computer. The inner motion sensor will wake up the computer automatically when you start cycling; with no operation for minutes, it will enter sleep mode to save battery power. Green back-light available and easy installation--press any buttons in night time 18:00-6:00, the green backlight will keep for 6 seconds automatically, making data clearly read at night. Accurate distance speed tracking and clear large display--as the wonderful pure wireless sign showed it has stable wireless trans.