Built-in high-sensitive GPS chip with accuracy within 5 meters. Supports Beidou, GPS, and Glonass for fast global positioning. Automatically sets time zone and provides GPS automatic timing for real-time data tracking. M3 supports 9 key riding data displays to help cyclists monitor their performance. Entry-level GPS cycle computer designed for daily leisure riding. USB rechargeable with built-in 400mAh lithium battery; can be charged using any device with a USB DC 5V port. Note that GPS bike computers typically consume power faster than traditional models. IPX5 waterproof rating suitable for use in light to moderate rain; avoid submersion in heavy rain conditions. Ensure the USB cover is securely tightened during use. Features a 1.7-inch full-screen anti-glare monochrome LCD with white backlight for clear visibility in both dark and daytime conditions. Compact and lightweight design fits comfortably in the palm of your hand, easy to carry. Suitable for various outdoor fitness activities including cycling, racing bikes, RC cars, motorboats, canoeing, and drones.