The GNSS / GPSDO replacement antenna is a multi-band low-profile style GNSS active antenna designed for the new generation of multi-frequency, multi-constellation standard precision GNSS technology. This includes GPS satellites. It utilizes an integrated 26 dB gain pre-amplifier for optimal reception and is intended for interior glass installation (unsuitable for outdoor installations). Please note that if used in windows having a UV-reflective metal coating satellite reception will be attenuated.