Manual and Automatic Transfer Switch, AC120V 15A ATS Auto Transfer Switch Core Wires Connects

**** The Manual and Automatic Transfer Switch from Oono, a brand of CZH-LABS, has garnered mixed reviews from customers, highlighting both its functionality and concerns over safety standards. Users appreciate the versatility of the device, particularly its ability to effectively switch between different power sources, such as generators, inverters, and shore power. Its design, which includes four independently controlled relays, appears to enhance reliability and mitigate potential issues like arcing. Many customers reported successful tests in various setups, especially in residential and RV applications. However, a significant recurring concern among reviewers is the lack of safety certifications, such as UL or CE marks, which raises alarms regarding the unit's suitability for permanent installations within residential settings. Users expressed hesitance to rely on the switch for critical systems without these certifications, citing fears of potential hazards, including electric shock, fire risks, and the device's overall safety during extended usage. While the performance of the transfer switch—especially the quick transition times—has been lauded, the hesitation surrounding its safety features has resulted in some users feeling apprehensive about advocating its use. The product's affordability and ease of use make it appealing for short-term applications like camping or mobile setups, but those looking for a more permanent solution may need to look elsewhere unless safety concerns are adequately addressed. Overall, while the Oono transfer switch performs well for its intended tasks, potential buyers should weigh its practical benefits against the lack of regulatory approval for safety. **