This is a kind of fine quality bike odometer, with 2.36-inch large screen can measures temperature and speed. Easy to read LCD display with large screen, also has backlight, you can see the data clearly. Easy to control, and easy to install firmly with mounting accessories. Perfect to use when hiking, climbing, riding and other outdoor actives. You can have a try. Features: 2.36 inch HDscreen display, big numbers make you see the data easily. 18 kinds of rich functions to meet your needs, such as SPD, AVS, MXS, DST, ODO etc. Waterproof design without fear of rain. Strong waterproof design, no effect to ride in rain. Touching to turn on the backlight. Full screen backlight, worry-free night riding. Convenient touched sensor keys design. Touching to turn on the luminous mode. Auto power off/auto wakeup. Automatically identify the start and stop status of the bicycle, start and stop automatically, saving energy. Fine quality core chip, to ensure accurate data recording, ridiing data can be read anywhere and anytime. Lower power consumption, lasting endurance. Specifications: Material: ABS Color: Black, White (Optional) Base type: Ordinary Base Type(Type A), Ordinary + Extension Base Type(Tpye B) (Optional) Battery: 2 * CR2032 Button Battery, 3.0V 240mAh (included) Speedometer Size: 75 * 45mm / 3.0 * 1.8in Package size: 135 * 73 * 45mm / 5.3 * 2.9 * 1.8in Package weight: Type A: 103g / 3.6ounce Type B: 119g / 4.2ounce Packing List: Type A: 1 x Bike Computer(Battery Included) 1 x Speed Sensor 1 x Magnet 1 x Base Silicone Pad 1 x Base 1 x Sensor Rubber Pad 4 x Tie Band 1 x Instruction Manual Type B: 1 x Bike Computer(Battery Included) 1 x Speed Sensor 1 x Magnet 1 x Base Silicone Pad 1 x Base 1 x Extension Bracket 1 x Sensor Rubber Pad 4 x Tie Band 1 x Instruction Manual