POLYPHASER~Coax 698-2700 MHz Female / Female 4.3-10 connectors. DC Block. Low PIM. PolyPhaser’s patented spiral inductor technology, respond almost instantaneously to a lighting surge. Typical PIM rating of -130 dBM (-173 dBc, 2 x 20 W). Bi-directional for ease of installation. Bulkhead mountable. Engineered to support 4G LTE and cell bands