The backrest of this single sofa chair features free manual adjustment, allowing it to easily transform from a standard sofa to a comfortable recliner. With simple manual operation, no cumbersome disassembly or movement is required, perfectly catering to your diverse needs—whether you’re reading, resting, napping, or watching movies—and letting you enjoy a cozy lying experience anytime, anywhere.Built-in cup holders are installed on both sides of the sofa armrests, designed for daily drinks like water cups, cola cans and coffee cups, with moderate depth and stable support to prevent tipping. Additionally, a USB data cable interface is integrated into the side of the armrest, offering convenient charging for mobile phones, tablets or earbuds—eliminating the hassle of searching for a power socket and ensuring uninterrupted relaxation.