A 2T2R (Two Transmit, Two Receive) omni antenna is a type of antenna used in wireless communication systems, such as Wi-Fi or cellular networks, where two transmitters and two receivers are employed. The "2T2R" designation indicates that the antenna is designed to support spatial diversity, which helps improve the reliability and performance of the wireless link.

An omni antenna, also known as an omnidirectional antenna, is designed to radiate and receive signals in all directions. It provides a 360-degree coverage pattern, allowing communication in multiple directions simultaneously. This type of antenna is commonly used in scenarios where the transmitting and receiving devices are distributed in various locations, and a wide coverage area is required.

Regarding a GPS/GPS+GLONASS antenna, GPS (Global Positioning System) is a satellite-based navigation system operated by the United States, while GLONASS (Global Navigation Satellite System) is a similar satellite navigation system operated by Russia. A GPS/GPS+GLONASS timing antenna is designed to receive signals from these systems to determine accurate positioning and navigation information.

These antennas are commonly used in various applications, including vehicle navigation systems, asset tracking, precision agriculture, surveying, and outdoor recreational activities like hiking or geocaching. The GPS/GPS+GLONASS antennas usually have a small, compact form factor and are designed to provide reliable signal reception for accurate positioning in outdoor environments.