698 ~ 2700 MHz Low PIM slim omni antenna: A wideband indoor ceiling-mounted omnidirectional antenna covering frequencies from 698 MHz to 2700 MHz, suitable for GSM, 3G, 4G/LTE, and other wireless systems. It features a low PIM (Passive Intermodulation) design to ensure clean signal performance, making it ideal for high-capacity DAS (Distributed Antenna Systems) and enterprise wireless networks. The slim, discreet profile allows seamless integration into modern indoor environments while delivering consistent, wide-area coverage and reliable connectivity.