The 50PA-951 from JFW Industries is a Handover Test System with AC Supply Voltage 100-240 VAC @ 47-63 Hz, Attenuation 0 to 95 dB, Frequency 500 MHz to 6 GHz, Input Power 27 dBm, Insertion Loss 29.9 to 35.5 dB. Tags: Rack Mount, Limited Fan Out. More details for 50PA-951 can be seen below.