This is a multi-functional cycling meter, which can record and display cycling speed in real time, can measure pedal frequency, heart rate, can display total mileage, and so on. Features: Highly sensitive Global Position System chip, accurate global positioning. 2.4in large screen with adjustable backlight, clear and comfortable reading. The panel is clear and scratch-resistant. Compact size and lightweight, curved lines reduce wind resistance. Multi-types of data display: speed, average speed, pedal frequency, heart rate, power, ride time, ride distance, ODO, calories, temperature, altitude, slope, cumulative rise, etc. Data such as your cycling distance can be viewed and shared through the APP. Support to store datas of two bikes. USB rechargeable design. IPX5 waterproof, not afraid of rainy day. Easy and convenient installation. Specifications: Color: white+black Waterproof: IPX5 Material: ABS+acrylic Screen: 2.4in Battery: 3.7V, 900mAh Package size: 130 * 120 * 55mm / 5.1 * 4.7 * 2.2in Package weight: 248g / 8.7ounce Packing List: 1 * Speed Meter 1 * USB Cable 1 * Wrench 2 * Bracket 1 * Screw 2 * Rubberrings 1 * User Manual