The PiMPro Tower 1821 from Communication Components Inc is a PIM Analyzer with TX Frequeny 1.805 to 1.88 GHz, RX Frequency 1.73 to 1.95 GHz, 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 1821 can be seen below.