The APTDC-06-00130052-N from AmpliTech, Inc. is a Directional Coupler with Frequency 130 to 520 MHz, Coupling 6 dB, Coupling Variation ±1.0 dB, Frequency Sensitivity ±1 dB, Directivity 18 to 25 dB. Tags: Module with Connectors. More details for APTDC-06-00130052-N can be seen below.