1. Lower power supply noise, less noise when using harmonics; 2. Built-in 400mAh battery 3. Add a Micro-SD card to save the ; 4. Add RTC support; 5. Modify the port names to Port1 and Port2 Measurement Frequency: 10KHz -1.5GHz Output: -13dbm (maximum -9dbm) Frequency Accuracy: Less than 0.5ppm Measurement Range: 70dB (50kHz-300MHz), 50dB (300M-600MHz), 40dB (600M-900MHz) enable extended firmware) Port SWR: Less than 1.1 Display: 2.8 inch TFT (320 x240) USB Interface: USB Type-C; Communications Mode: CDC (Serial) Power Supply: USB 5V 120mA, built-in 650mAh electricity, maximum charging current 0.8A Number of Calibration Points: 101 (Fixed) Number of Scanning Points: 101 (Fixed) Display Tracking: 4, Marking: 4, Save Setting : 5 Measuring S parameters, voltage standing wave ratio, phase, delay, chart and the like Colour:black Material:Metal + Plastic Package Contents: 1 x host (including 2.8-inch touch screen, 400mAh battery) 2 x 20cm SMA male to male RG174 cable 1 x SMA female to female connector 1 x SMA Simple Calibration Kit SHORT 1 x SMA Simple Calibration Kit OPEN 1 x SMA Simple Calibration Kit LOAD 1 x USB Type-C data cable 1 x Touch pen 1 x Picks Only the above package content, other products are not included. Note: Light 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.