This module is a complete satellite positioning receiver equipment, with a full range of features to meet the stringent requirements of professional orientation and personal consumption needs. The product can be used to develop a variety of GPS terminal products such as: high-altitude weather detection, car navigation, car security systems, vehicle monitoring and other satellite positioning applications. This paper describes the electrical, mechanical and other properties of NS-25B GPS module. Excellent sensitivity (Tracking Sensitivity: -161 dBm) at the time of weak signal, TTFF (Time To First Fix) positioning is still very fast lightweight (28mm * 25mm * 7mm), suitable for a particular device antenna space requirements combined GPS Module II One supports NMEA 0183 and SiRF binary protocol