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 real-time GPS timing. Real-time ride data monitoring: M3 supports display of 9 key riding metrics to help cyclists track 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. Ensure the USB cover is tightly closed during use. Full-screen white backlight with 1.7-inch anti-glare monochrome LCD; ensures clear visibility of data in both dark and bright conditions. Compact mini design fits comfortably in the palm of your hand and is easy to carry. Suitable for daily cycling and other outdoor activities such as racing bikes, RC cars, motorboats, canoes, drones, and fitness sports.