The WSDU-1X4ER from Becker Nachrichtentechnik GmbH is a Multicoupler with Frequency 10 MHz to 8.5 GHz, Gain 1 to 5.5 dB, Gain Flatness ±1.2 dB, Isolation 55 to 70 dB (Reverse Isolation), 20 to 50 dB (Output Isolation), Noise Figure 8 to 11 dB. Tags: Rack Mount. More details for WSDU-1X4ER can be seen below.