This is one RF Bay, Inc. New DC-4200MHz 2-Way 0 degree Resistive Power Combiner/Splitter, Model Number: PSC-2R-42 with 3-SMA Female Connector.

General Specifications:

• Frequency Range: DC-4200MHz;
• 2-Way 0 Degree
• Insertion Loss: 0.4dB typ over 6dB
• 1 Watt Power Handling
• 50 Ohm Input/Output
• Low Phase and Amplitude Unbalance
• SMA Female Connector

Detail Spec on Web as follows:

http://www.rfbayinc.com/upload/files/psc/psc-2r-42.pdf