Radioberry Preamp Board- Output 1.5W -3W for HF Power Ampfier (10W-100W PA)- Input SMA, Output SMA, come with 3 SMA cable 1 for Rx, 1 for Tx, 1 for ANT What is it used for? Radioberry Preamp Board is an Open Source Project, supports code refactoring. Assemble with Radioberry, Radioberry Preamp Board and Radiobary Juice USB Board to build your SDR transceiver. What's Inside? 1x Radioberry Preamp Board3x SMA cable (1 for Rx, 1 for Tx, 1 for ANT) 1x 8V Battery-powered Wire 1x Connecting Row Needle 4x 32mm Screw 4x 5mm Nut 8x 11mm Plastic Column