3-in-1 Laptop Stand : Open the bottom of left and right foot frame,put your laptop on it,the laptop stand can be as a Display height bracket,also can be used for storage keyboard and mouse ; 9 level of view angle adjustable design,which can be adjusted according your different demands to prevent eyestrain and neck pain; On this stand's back , designed with phone holder on the left and right sides to place the mobile phone. Adjustable Laptop Holder:9 leves of view angel adjustment,you can incline at different angles and stand it up higher or lower depending on your needs, ergonomic laptop stand will help decrease the fatigue and soreness in your body after long hours of uncomfortable seating and hunching. Laptop Riser with Heat-Vent : This macbook stand have a big hole for ventilation, and designed with cooling slot, insert cooling silicone pad into the corresponding cooling slot,adjust it to the appropriate position according to the needs of its own notebook and tablet. which is to cool down your laptop by providing more air flow than if it were laying flat on the table.