Bike Computer Wireless Wired Bicycle Computer Bike Cycling Odometer Stopwatch Speedometer SD-568AE MTB Riding Stopwatch? Features: *1. Multifunctional wired bicycle speedometer, includes all vital functions for novices and pros alike. *2. Real-time display of the current speed, odometer, trip distance, maximum speed, average speed, elapsed time, temperature, calories, etc. *3. Engineering plastic and electronic components material with LCD backlight, good durability and have a clear view of the data even at night. *4. Imported sensors to provide stable performance, and accurate speed. *5. Durable and waterproof, which can be used under all conditions. *6. Easy to install firmly with mounting accessories. *7. Ideal accessory for bicycle training.? Specification: Material: ABS + electronic components Display: LCD display Size: 4.5*4.5*2.0cm Weight: about 65G Power supply: Head button battery CR2032*1 Color: black/silver Backlight: green light Lists: Header * 1 Wired base * 1 Magnet * 1 Cable tie * 6 Manual * 1 Notes: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight manual measurement deviation for the data.