The PiMPro Tower 850 from Communication Components Inc is a PIM Analyzer with TX Frequeny 869 to 894 MHz, RX Frequency 835 to 849 MHz, Transmitter Freq. Accuracy < 5 ppm, Tx Carrier Power 24 to 46 dBm × 2 (250 mW to 40 W × 2), Transmitter Power Accuracy 0.3 dB. Tags: Portable. More details for PiMPro Tower 850 can be seen below.