The main function of the standard firmware is to measure antenna performance.Rugged and durable, effectively shields electromagnetic interference and ensures measurement accuracy.With an 2.8-inch LCD display, it is a DIY product that provides perfect vector network measurement functions.Small and portable, flexible and convenient operation.Easy to use, this project to provide a small but useful tool for RF enthusiasts.Measurement frequency: 50KHz ~ 300MHz (50KHz -900MHz, enable extended firmware)RF output: -13dbm (maximum -9dbm)Frequency accuracy: Less than 0.5ppmMeasuring range: 70dB (50kHz-300 MHz), (50dB (300M-600MHz), 40dB (600M-900MHz) with extended firmware enabled);Port SWR: Less than 1.1Display: 2.8 inch TFT (320 x240)USB interface: USB type-C Communication mode: CDC (serial)Power supply: USB 5V 120mA, built-in 400mAh battery, maximum charging current 0.8ANumber of calibration points: 101 (fixed)Number of scan points: 101 (fixed)Show Tracking: 4, Markers: 4, Settings Saved: 5Measure S-parameters, VSWR, phase, delay, chart...;Dimensions: 54mm x 85.5mm x 11mm (without connectors and switches)Colour:blackMaterial:MetalSize:54mm x 85.5mm x 11mmPackage Contents:1 x host1 x Type C data cable1 x USB data cable1 x stylus2 x RF cable4 x adapterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.