Features:-Material: Plastic-Multi-functional, can be mounted to steering wheel, passenger seat and seat back.-Can be used as a desk providing convenient place for notebook, food, drink, etc.-The thickness is only 4 cm after it be returned to the upright position against the seat back.-Easy installation and optional adjustable angle, fitting any steering wheel or car seat-Additional Slider for placing food / Drinks or mouse at the same timeHow to use:Mount on steering wheel-Hook the hangers on the top of the steering wheel-Adjust the tray to suitable height and tighten the both knobs-Adjust the angle of the horizontally and tighten the knob on the frame.Mount on seat back-Install the hangers on both sides of bracket, then hook under the headset and hang Off the seat back-Adjust the tray to suitable height and tighten both knobs.-Adjust the angle of the tray horizontally and tighten the knob on the frame.To fold the tray-Loosen the knobs-Fold the tray against the seat back, as shownCaution:-Do not mount it onto steering wheel while driving.-The tray should be mounted in the horizontal position.-The max. load of the tray is 10 kg.-Make sure the knobs are tight after installation.Package Content:1 x Speedwav Car Steering / Back Seat - Laptop and Dinning Tray with Adjustable Slider