Feature: 1. TOUCH SCREEN: Equipped with a 4in 480 x 320 sensitive touch screen, this vector network analyzer can accurately measure the S11 reflection coefficient and S21 transmission coefficient of high frequency networks. 2. WIDE APPLICATION: Suitable for radio amateurs to check and adjust antennas, measure coaxial feeders, line analysis and scanning, shorten the coefficient, phase, and magnification of antenna amplifiers, etc. 3. FREQUENCY RANGE: The analyzer features an ultra wide measurement frequency range of 50KHz-4GHz, with improved accuracy, up to 90dB dynamic range (to 1GHz) and up to 80dB dynamic range (to 3GHz). 4. HIGH PERFORMANCE: This vector network analyzer has fast scanning speed, high strength, good stability, high sensitivity and accuracy, supports PC control, and is compatible for Linux, for Windows (7+), for OS X (10.11+). 5. WITH BATTERY: With a clear screen and perfect size, built in rechargeable battery, has long battery life, and battery LED indicator on the back, the closest to the CH1 port connector is the lowest battery, indicating ≤ 25%. Specification: Item Type: Vector Network Analyzer Measurement Frequency Range: 50kHz-4.4GHz System Dynamic Range: 70dB (calibrated, f < 3GHz, IFBW=800Hz, 1xAVG) System Dynamic Range: 80dB (calibrated, f < 3GHz, IFBW=160Hz 5xAVG) System Dynamic Range: 90dB (calibrated, f < 1GHz, IFBW=40Hz 20xAVG) S11 Noise Floor: -50dB (to 1.5GHz); -40dB (to 3GHz) (calibrated) Scan Rate: 400 points/sec (f ≥ 140 MHz), 200 points/sec (f < 140 MHz) Scan Points (USB): 1-1024 points, adjustable Sweep Points (on The Device): 10-201 points, adjustable Supply Current: 400mA typical, 500mA maximum Battery Capacity: 3200mAh lithium battery (built in battery) Power Supply: USB, 4.6V-5.5V Working Environment Temperature: 0℃-45℃ Port 2 Return Loss: ≥ 15dB (to 3GHz), 20dB (to 1.5GHz) USB Interface: USB Type B RF Port: SMA . Package List: 1 x Vector Network Analyzer1 x Calibration Kit Open1 x Calibration Kit Short1 x Calibration Kit Load1 x Calibration Kit Thru2 x Male to Male SMA Cable2 x Adapter Cable (20cm / 7.9in)1 x USB2 B to USB2 A Cable1 x Touch Pen1 x PCB RF Test Board Note: After receiving your device, please update the firmware and check the configuration in the menu.