Fangrui Product Details This Is A Diy Product That Provides The Most Complete Vector Network Measurement Function Possible In A Credit Card Size Includes A 2.8-inch Touch Screen, 400mah Battery, Tx/rx Mode Measurement Tx/rx Method Allows Complete Measurement Of S11 And S21 Parameters Obtaining The S12 And S22 Parameters Requires Manual Reconfiguration Of The Transceiver Port Wiring, Thus Increasing The Devices Versatility In A Variety Of Network Analysis Tasks. Lower Power Supply Noise, Less Noise When Using Harmonics; Measurement Frequency: 50khz - 1.5ghz Rf Output: -13dbm (max -9dbm) Frequency Accuracy: Less Than 2ppm Frequency Stability: Less Than 0.5ppm Measurement Range: Measurement Range: 70db(50khz-300 Mhz),(50db (300m-900mhz), 40db (900m-1500mhz)); Port Swr: Less Than 1.1 Display: 2.8-inch Tft (320x240) Usb Interface: Usb Type-c Communication Mode: Cdc (serial) Power Supply: Usb 5v 120ma, Built-in 400mah Battery, Maximum Charging Current 1a, Can Be Used Continuously For More Than 4 Hours Number Of Calibration Points: 1