Built-in high-sensitivity GPS chip: Accuracy within 5 meters. Beidou GPS Glonass. Fast global positioning. To set time zone. GPS automatic time setting real-time data. Cycle with control: M3 can support 9 key cycling data and help cyclists master their cycling status. M3 is an entry-level GPS bike computer that meets your daily leisure cycling needs. USB rechargeable: USB charging with built-in 400mAh lithium battery. Can be charged by any device with the USB DC 5V port. It is normal for the GPS bike computer to consume power much faster than a traditional bike computer. IPX5 waterproof: Suitable for use in light to moderate rain. Please do not immerse it in large and heavy rain conditions. Please tighten the USB cover during use. Full-screen white backlight: 1.7-inch full-screen anti-glare mono LCD backlight; Data can be seen clearly in dark and daytime. Mini body design: Mini size to hold in a palm; Convenient to carry around. In addition to daily cycling, also suitable for racing bikes, RC cars, motorboats, canoeing, drones, etc. outdoor fitness sports.