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◕‿◕ This is a DIY product with vector network measurement function. It includes a 2.8-inch touching screen, TX/RX measurement, can determine the complete S11 and S21 parameters, if you need to get S12 and S22, you need to manually replace the transceiver port wiring. ◕‿◕ Specifications: ▶Material: PCB ▶Color: black ▶Measurement frequency: 50KHz~300MHz (50KHz~900MHz, enable extended firmware)(the products will be updated with the latest firmware before shipping, the actual measurement frequency is 50KHz~900MHz) ▶RF output: -13dbm (maximum -9dbm) ▶Frequency accuracy: