2. The Most Cost-Effective Chip Adf4351 Is As The Reference Signal Source, Which Can Accurately Measure The Frequency Value. 3. Use High-Performance Mixers And Detectors With Micro-Adjustment Software Parameters To Measure Signal Amplitude Values. 4. Use Stm32f4 Series Microcontroller And 4.3-Inch Color Lcd Screen Features: 1. In The Design Of This 4.3-Inch Tft Color Lcd Screen Spectrometer, 5. Black Aluminum Alloy Shell, Beautiful And Sturdy, Weight: 0.74295782294 Pounds, Manufacturer: Junterone