Features:Economic layout: the accuracy of latitude and longitude GPS receiver can be as accurate as 1 meter to 2 meters in a well-open sky. In the GPS industry. This chip is very cost-effective.Support SYSTEM: Mac os , Linux, Windows ME /98/ CE , Server 2003, Server 2008, Vista , Xp, Windows 7, Windows 8, Windows 10, all windows series systems.Easy connection: The USB interface of the GPS receiver is standard USB 2.0 protocol interface. It supports all computers. It is easy with all computers. It is easy to communicate with your computer by following the za simple driver. Good performance: the GPS receiver agrees that it can also be tested za U-CENTER test software. It also supports all U-CENTER instruction configurations. Water resistant: It is mainly made of the highest quality material, whose water resistance is IP67, so you can use it normally, even if it touches the water, serving you for a long time. Technical data: Model: BS -708 GPS receiver Material: ABS Chipset: G7020-KT Frequency: GPS L1, SBAS L1, QZSS L1 Reception format: GPS, SBAS, QZSS Channels: 56 search channels Tracking: -162dBm Request: -160dBm Cold Start : -148dBm Horizontal position: 2.0m (typical open sky) Speed: 0.1 m/s 95% ( SA off) Time: 1us synchronized with GPS time Cold Start : 29s Warm Start : 25s Hot Start : 1s Support rate: 4800 bps to 921600 bps, automatically adjusted baud rate Data level: USB level Data protocol: NMEA-0183 Message NMEA: RMC, VTG, GGA, GSA, GSV, GLLUpdate rate: 1Hz-10Hz, default 1HzFLASH: 4M FLASH , store the configuration permanentlyAltitude: lt ;50,000mSpeed: lt ;515 m/sAcceleration: lt ;4gVCC: DC voltage 3.6V-5.5V, typical: 5.0VCurrent: capture 45mA/5.0VDimension: 56mm*56mm*18mmWeight: 70gConnector: USB 2.0 interfaceCable length: 2.0mFixed: magnetic bottom,Waterproof grade: IP67Operating temperature: -40deg;c85deg;cStorage temperature: -40deg;c105deg;c The size may be slightly different due to manual measurement, please in kind prevail. Thanks za understanding.