NanoVNA-H Vector Network Antenna Analyzer 2.8-Inch Touch Screen, 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 device's 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: 101 (fixed) Number of scan points: 101 (fixed) Display tracking: 4, Marker: 4, Settings saved: 5 Colour:As Shown Material:Metal Package Contents: 1 x Vector network antenna analyzer with accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.