Feature: 1. Global Positioning System and BDS positioning system, quick and accurate positioning. 2. 26 cycle datas for customizable display. 3. The 2.4 inch large LCD screen can clearly display cycle data. 4. After BT is connected to the device , a command can be issued to perform an internal calibration of the power sensor so that the sensor count will display normally during subsequent rides. 5. Large capacity battery for long working time. 6. USB rechargeable design, you don\u0027t need to worry its battery. 7. Wide compatibility, supports multiple peripherals. 8. Automatic backlight, intelligent design. 9. IPX7 waterproof, resistant to heavy rain and harsh weather. 10. You can download an app to view cycle data through your mobilephone. Specification: Specifications: Main color: black Material: ABS Battery: 3.7V, 1000mAh Water Proof: IPX7 Screen size: 2.4in Item size: 81 * 54 * 22mm / 3.2 * 2.1 * 8.7in Item weight: 61g / 2.2ounce. Package List: 1 x Speed Meter 1 x USB Cable 1 x User Manual 1 x Mount Base 1 x Rubber Pad 2 x Rubber Rings