The 50PA-561 from JFW Industries is a Handover Test System with AC Supply Voltage 100-240 VAC @ 47-63 Hz, Attenuation 0 to 63 dB, Frequency 2 to 6 GHz, Input Power 27 to 33 dBm, Insertion Loss 24 dB. Tags: Rack Mount, Limited Fan Out. More details for 50PA-561 can be seen below.