Support measurement range: 70dB (50kHz-300 MHz), (60dB (300M-900MHz), 40dB (0.9G-1.5GHz)) The main function of the standard firmware is to measure antenna performance. Rugged and durable, effectively shields electromagnetic interference and ensures measurement accuracy. Small and portable, with an 4-inch LCD display, it is a DIY product that provides perfect vector network measurement functions. Easy to use, this project to provide a small but useful tool for RF enthusiasts. Measurement frequency: 10KHz ~ 1.5GHz RF output: 0dbm (2dB, fundamental wave) Frequency accuracy: Less than 2ppm Frequency stability: Less than 0.5ppm Measuring range: 70dB(50kHz-300MHz),(60dB (300M-900MHz), 40dB (0.9G-1.5GHz)); (When using harmonic measurement, it is necessary to pay attention to the error caused by the nonlinear transformation of the fundamental wave) Port SWR: Less than 1.1 Display: 3.95inch TFT (320 x 480) USB interface: USB type-C Communication mode: CDC (serial) Power supply: USB 5V 220mA, built-in 2000mAh battery, maximum charging current 1A Number of calibration points: 401 (fixed), unlimited when connected to a PC Number of scan points: 401 (fixed), unlimited when connected to a PC Scan point speed: 600 p/s(=4000Hz), Show Tracking: 4, Markers: 8, Settings Saved: 7 Dimensions: 75x 33x18mm (excluding protrusions) Colour:black Material:ABS Package Contents: 1 x -H4 host 1 x USB data cable 1 x Type C data cable 2 x SMA male to male RG316 RF cable 1set x SMA calibration kit 1 x SMA female to female connector Only 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.