This LOT is one RF Bay, Inc. New 50-4500MHz +21dBm Output Medium Power RF Amplifier, Model Number: MGA-4-33 with SMA Female Connector. Detail Spec on Web as follows. This item is in the category "Business & Industrial\Test, Measurement & Inspection\Signal Sources & Conditioning\RF & Microwave Amplifiers". The seller is "rfextra" and is located in this country: US.