Simple panel design for easy operation, making it user-friendly for technicians. Multi-functional refrigerator tester for adjusting frequency and testing various components including inverter boards, compressors, and fans. Waterproof and dustproof buttons designed for the pulse solenoid valve tester, ensuring durability in various environments. Equipped with a digital display screen to show detected parameters for easy monitoring. Capable of testing both single and dual dampers, as well as fixed-frequency compressors, enhancing versatility.