Features MAIN PURPOSE: The vector impedance analyzer is mainly used to test antenna impedance, RF device impedance, circuit board impedance, etc. MEASURING PARAMETER: Can be used to measure resistance, reactance, standing wave, and S11, with a wide measurement range, high resolution, and accuracy. BUILT IN BATTERY: The antenna analyzer has built in 2000mAH polymer lithium battery, USB interface for charging, can operate continuously for over 4 hours. OTHER FUNCTIONS: The single point measurement result is 4 digit significant figures, 280 scanning points, with calibration function, stable and reliable. 2.4IN TFT SCREEN: The antenna impedance analyzer adopts 2.4 inch TFT screen, lightweight and portable, suitable for outdoor and high altitude work. Specification: Item Type: Antenna Analyzer Working Frequency: 137.5MHz-2700MHz Frequency Step: 1kHz Display: 2.4 Inch TFT Resolution 320x240 (QVGA) Battery: 2000mAH Polymer Lithium Battery (built in battery) Power Consumption: <1.5W Charging Current: 400mA Charging Interface: USB (only used as a charging interface) Automatic Shutdown: Settable (continuously on, 5-60 minutes optional) Measurement Parameters: Resistance, Reactance, Standing Wave, S11 Resolution: 4 Significant Value Frequency Accuracy: <±10ppm Connector: SMA-K Measurement Range:  Impedance: Frequency <1300MHz (absolute impedance value), frequency >1300MHz (absolute impedance value) Standing Wave: Frequency <1300MHz, frequency >1300MHz S11: 0dB to -50dB Error (Single Point Measurement):  Impedance: Z <200Ω, frequency <1.3GHz; Z <200Ω, frequency >1.3GHz S11: 0dB to -10dB, -10dB to -20dB, -20dB to -40dB Standing Wave: <2, 2<VSWR<10 Directionality (After Calibration): 137.5MHz, 34.375MHz -2GHz, 2GHz -2.7GHz Scan Points: 280 Output Level: -18dBm Working Temperature: 5℃-40℃ Atmospheric Pressure: 860hPa-1060hPa Package List: 1 x Antenna Analyzer 1 x USB Cable 1 x User Manual Package List 1 x Antenna Analyzer 1 x USB Cable 1 x User Manual