The APTDC-20-00130052-N from AmpliTech, Inc. is a Directional Coupler with Frequency 130 to 520 MHz, Coupling 20 dB, Coupling Variation ±1.8 dB, Frequency Sensitivity ±1.50 dB, Directivity 20 to 25 dB. Tags: Module with Connectors. More details for APTDC-20-00130052-N can be seen below.