Refrigerator maintenance tool: Essential for professional and DIY appliance repair. Pulse solenoid detection: Identifies valve issues to prevent system failure. Frequency conversion testing: Accurately detects refrigerator compressor performance for efficient maintenance. Compact and durable design: Easy to handle and built for long-term use. Note: we strongly recommend you seek professional installation. Please check as much as possible to make sure the item is what you need. Multi-functional refrigerator tester for adjusting frequency and testing various components including inverter boards, compressors, and fans. Equipped with a digital display screen to show detected parameters for easy monitoring. Waterproof and dustproof buttons designed for the pulse solenoid valve tester, ensuring durability in various environments. Simple panel design for easy operation, making it user-friendly for technicians. Capable of testing both single and dual dampers, as well as fixed-frequency compressors, enhancing versatility. Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. Voltage: AC100-240V Color: As Shown Material: plastic Package Contents: 1*Refrigerator Inverter Board 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.