CoolCold 5V Speed Control Version Gaming Laptop Cooler Notebook Stand,Spec: Red Symphony Symphony EditionSeven Color EditionBasic Edition: 1. Fan speed: 1600-2500RPM1600-2500RPM2600+-10%RPM 2. Power supply: 5V USB power supply 3. Interface: dual USB interface 4. Lighting: 12 kinds of RGB lights (lights can be adjusted) 7 kinds of RGB lights (lights are fixed) no lights 5. Height: 7 levels of height adjustable 6. Wind speed adjustment method: dial adjustment 7. Current value: 1A+-10% 8. Fan speed: 1st gear 1600+-10%RPM, 2nd gear 2100+-10%RPM, 3rd gear 2500+-10%RPM 9. Product size: 405 x 285 x 43mm 10. Net weight: 1065 grams 11. Fan size: less than or equal to 140 x 140 x 20 (1PCS), less than or equal to 70 x 70 x 15 (4PCS) Features: 1. 5-core air duct direct access, highly silent design 2. Compatible with large area and full size, compatible with laptops within 17 inches 3. Ergonomic 7-level height adjustable to relieve shoulder discomfort 4. Retractable mobile phone holder, can be hung left and right 5. Anti-fall reinforced plastic, can accommodate non-slip baffle 6. It adopts dual USB interface output design, which can be connected to other devices without occupying the laptop interface