The omnidirectional indoor antenna can increase the effective wireless operating range for wireless devices. Since the antenna provides a gain of 4.5dBi, it can be connected to a wireless access point or router to improve signal transmission and reception in a 360-degree direction and provide wireless signal coverage from one point to multiple points. The antenna can be used on wireless devices with detachable antennas of lower gain for signal transmission/reception. It features an RP-SMA plug and can be connected to a wireless device equipped with an RP-SMA receiver. Simply remove the existing detachable antenna from the wireless access point or router and connect the antenna to the RP-SMA receiver of the wireless device. Transfer 150Mbps.