Features: 1. 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. 2. Curved square shape body, quick-respond press buttons, exact modes display, you have all cycling data easily by this cycling computer. 3. 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. 4. 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. 5. Accurate distance speed tracking and clear large display--as the wonderful pure wireless sign showed it has stable wireless trans 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:1/2pc * bicycle speedometer+1/2pc * mounting block+1/2pc * transmitter sensor+4/8pcs * 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 Small size and lightweight design for convenience and portability Wireless and waterproof features ensure durability in various weather conditions Measures speed, distance, and riding time for comprehensive cycling data Simple installation process that takes only a few minutes Easy-to-navigate interface with only two buttons for accessing all measurements