1. Each module of this RF demo kit has been carefully selected for its , reliability, practicality, and long service life. Additionally, the board is lightweight, making it easy to carry and very userfriendly. 2. Please note that this product includes only 2 UFL jumpers. Frequent connection changes may cause inconvenience. Please carefully. Our products come with quality assurance. If you have any questions during use, feel to contact us. 3. 18 function modules: The board is fully integrated with 18 function modules, which can be used to measure a 30 MHz shortwave lowpass filter (LPF), a 100 MHz FM pass filter (HPF), a 433 MHz commonly used SAW bandpass filter (BPF), and a 6.5 MHz ceramic trap (BSF). 4. Application: This RF demo kit, test board, and calibration board are designed for learning vector network analyzers and antenna analyzer testing, calibration, and education. The RF test board is useful for beginners looking to explore the secrets of spectrum and vector analyzers.