The RC2004A-FHW-ESV is a MEMs-based GPS receiver module manufactured by Raystar. It has a built-in 25x25mm ceramic patch antenna and is designed to be compliant with global navigation satellite systems (GNSS) such as GPS, GLONASS, Galileo, and QZSS. It supports signal tracking in both standalone and assisted modes and also offers navigation services for cars, ships and aircrafts. The module also supports navigation in signal-degraded conditions, like tunnels or other urban canopy environments. It has excellent signal Detection.