Features: 50KHz-4GHz measure ranging,4inch screen,mini and light weight design. This Antenna Analyzers is provides outstanding Vector Networks measurement capabilities and perfect for evaluating Antenna resonances and Standing WavesRatio.It is a very practical Analyzers for electronics engineer, amateurs radio operators and radio diy amateurs. System dynamic ranging: 70dB (to 3GHz, after calibration, not averaging) System dynamic ranging: 80dBs (to 3GHz, after calibration, 5xaverage) System dynamic ranging: 90dB (to 1GHz, after calibration, 20xaverage) Specifications: Material:AluminumAlloy S11noise floor (after calibration): -50dB (to 1.5GHz); -40dB (to 3GHz) Scannings rate: 400points/second (f >= 140MHz), 200points/second (f <140MHz) Number of scannings point (on the device screen): adjustment, up to 201points Number of calibration point (the maximums number of scan point for USB): 1024points Power supply: USB Display screen: 4inch (480x320) Battery: with 3200mAh lithiums battery Port 2 return loss: >= 15dB (to 3GHz), 20dB (to 1.5GHz) Display tracking: 4, marking: 4, setting save: 7 Package Includes: 1Set Vector Networks Analyzers note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.