1. Metal casing, large screen, more accurate touch, easy operation, no need to connect power, get rid of the shackles of data lines, and can be used alone. 2. Powerful functions: the product can test not only 3G but 2.4G antennas, but also duplexers and filters. 3. It can test the standing wave impedance of the antenna, and can also debug the insertion loss, isolation, and standing wave of the duplexer filter. It can also test the attenuation, shortening factor, and phase of the cable. It can also test the magnification of the antenna amplifier, and it has a powerful frequency meter function. 4. Specifications: Measurement frequency range: 50kHz - 3GHz System Dynamic Range (Calibrated): 70dB (50k to 1.5GHz); 60dB (to 3GHz) S11 Noise Floor (Calibrated): -50dB (to 1.5GHz); -40dB (to 3GHz) Scan rate: 100 points/second Number of scan points (on device screen): adjustable, up to 201 points Number of calibration points (USB maximum number of scanning points): 1024 points (when connected to a computer to use the host computer) Power supply: USB, 400mA RF port: SMA (not RP-SMA) USB interface: Micro USB Display Screen: 3.2 inch TFT (320 x 480) Battery: 2000 mAh 3.6V/3.7V lithium battery, 6*40*60 mm (maximum size) Net weight: 320 grams Port 2 Return Loss: >= 13dB (to 3GHz), 20dB (to 1.5GHz) Show Traces: 4, Markers: 4, Settings Saved: 5 Computer software compatible: Linux, Windows (7 or above)