Common mechanisms include movable backrests that switch between loveseat and chaise configurations, 3‑in‑1 conversions (sofa, lounger, bed), and pull‑out sleeper or trundle systems that use smooth‑glide tracks or click‑clack multi‑position backs.
Frequently listed convenience features include built‑in USB and Type‑C charging ports, hidden armrest storage and under‑bed storage boxes, integrated cup holders and phone mounts, plus side fabric pockets for devices and magazines.
