ABS material: constructed from durable ABS material for everyday use, offering wear resistance and longlasting performance so you can trust it to support your sofa adjustments over time. USB port for charging: builtin USB port allows you to charge devices while you adjust the sofa, providing a convenient charging solution right at hand. Twobutton control: two simple, easytouse buttons enable smooth adjustments to your electric sofa's position, delivering a comfortable and customized seating experience at the touch of a button. Easy installation: designed for quick and straightforward installation, making it simple to or upgrade your existing switch controller. Replacement or upgrade solution: specifically intended to or upgrade your current switch controller, helping restore or enhance sofa adjustability with minimal effort. Practical use scenarios: Living room or family room: easily find your ideal seating position for watching TV or reading, while keeping devices charged via the USB port. Home theater setup: quickly adjust for viewing angle and comfort during movies or presentations. Guest areas or lounges: simple upgrade to improve guest comfort with effortless, reliable control.