This is a kind of fine quality bike odometer, with 2.8-inch large screen can measures temperature and speed. Easy to read LCD display with large screen, also has backlight, you can see data clearly. Easy to control, and easy to install firmly with mounting accessories. Perfect to use when hiking, riding and other actives. You can have a try. Features: 2.8-inch large screen can measures temperature and speed. odometer with LCD backlight function. Portable, practical and convenient, with fine durability and can provides long service time. Easy to read LCD display with large screen, you can see data clearly. Easy to control, and easy to install firmly with mounting accessories. Perfect to use when hiking, riding and other actives. Perfect assistant for training. Time display function, also can be used as a practical gadget for traveling. Specifications: Name: Odometer Type: A, A-wireless, B, B-wireless, C (optional) Backlight color: Green Waterproof: Yes Battery: 1 * CR2032 Button Battery(wired type), 2 * CR2032 Button Battery(wireless type) 3.0V, 240mAh (included) Item size: 75 * 50mm / 2.95 * 1.97in Package size: 110 * 70 * 60mm / 4.33 * 2.76 * 2.36in Package weight: A: 129g / 4.55ounce A-wireless: 139g / 4.90ounce B: 105g / 3.70ounce B-wireless: 112g / 3.95ounce C: 139g / 4.90ounce Packing List(A): 1 * Odometer 1 * CR2032 Battery 1 * Magnet 1 * Extension Mount 1 * Sticker 2 * Ties 1 * Binding 1 * Manual OR Packing List(A-wireless): 1 * Odometer 2 * CR2032 Battery 1 * Magnet 1 * Sensor 1 * Extension Mount 1 * Stickers 2 * Ties 1 * Binding 1 * Manual OR Packing List(B): 1 * Odometer 1 * CR2032 Battery 1 * Magnet 1 * Extension Mount 1 * Sticker 2 * Ties 1 * Binding 1 * Manual OR Packing List(B-wireless): 1 * Odometer 2 * CR2032 Battery 1 * Magnet 1 * Sensor 1 * Extension Mount 1 * Stickers 2 * Ties 1 * Binding 1 * Manual OR Packing List(C-wireless): 1 * Odometer 2 * CR2032 Battery 1 * Magnet 1 * Sensor 1 * Extension Mount 1 * Stickers 2 * Ties 1 * Binding 1 * Manual 2.8-inch large screen can measures temperature and speed. color:#c0392b;odometer with LCD backlight function. Portable, practical and convenient, with fine durability and can provides long service time. Easy to read LCD display with large screen, you can see data clearly. Easy to control, and easy to install firmly with mounting accessories.