ERP35B Model: 3R-029. Multi-functional， can be mounted to steering wheel， assistant seat and seat back. Can be used as desk providing convenient place for notebook， grocery food， drink， etc. The thickness is only 4cm after it be returned to the upright position against the seat back. Easy installation and angle adjustable will fit any steering wheel or car seat. Work as writing table or as a platform for your laptop computer. Reverse side is a food tray with drink holder. Foldable design save the room in the car.   Package Details Weight: 1016.50 g Size: 34*37*4.5 cm Package Includes 1 × Car Multi Tray Laptop Table Cup Holder Work Desk