Introducing our top-of-the-line {4.3" Mechanical Pushbutton Indoor Unit Model B4}, designed and manufactured by our reputable factory. This innovative product is crafted with meticulous attention to detail, ensuring unrivaled durability and performance. With its sleek and modern design, this indoor unit seamlessly blends into any interior setting. The user-friendly mechanical pushbuttons provide easy operation, while the 4.3" display offers clear and sharp visuals. Experience superior functionality and reliability with our {4.3" Mechanical Pushbutton Indoor Unit Model B4}, setting new standards in the industry. Trust our factory to deliver excellence in every product we create.