Feature:   1. Support measurement frequency up to 2700MHz, can measure resistance, reactance, standing waves, s11.         2. Built& 8209;in protection against overvoltage, overcurrent and short circuit, with stable performance.         3. Equipped with a 2.4in TFT display with a resolution of 320x240 and can be set to automatically shut down.         4. Selected high& 8209;quality alloy materials, durable and can be used for a long time.         5. Antenna analyzer has high measurement accuracy, stable appearance and good performance.                     Specification:           Item Type: Antenna Analyzer  Material: Alloy  Model: PS200  Working Frequency:34.5MHz-2700MHz                                                                                                                                                                                                                                                                                                                         Frequency Step: 1kHz  Display: 2.4in TFT Resolution 320x240 (QVGA)  Battery Capacity: 3600mAH (7.4Wh) (Built-In Battery)  Power Consumption: <1.5W  Charging Current: 400mA  Charging Interface: USB (for the time being only used as a charging interface, data transmission is temporarily not open)  Automatic Shutdown: Can be set (always on, 5 minutes to 60 minutes optional)  Measurement Parameters: Resistance, reactance, standing waves, s11  Resolution: 4 effective digits  Frequency Accuracy: <±3ppm  Connector: SMA-K  Impedance: 0.1Ω-1000Ω (absolute value of impedance)  Standing Waves: 1.000-65  Measuring Range: S11 (DB) 0dB ~ -60dB  Impedance:                  Standing Waves:                    Error: (single point measurement) s11 (dB/°) 5dB/20° (-20dB ~ -40dB)                      Directivity: <35dB (140MHz-2GHz after calibration), <30dB (2GHz-2.