ENKAY Hat-Prince Geometry Pattern Laotop Protective Crystal Case for MacBook Pro 16 inch A2141(Geometry No.2) Filter-Audio Optical Cables It can only be used

It can only be used when the USB is powered

the red and blue lights flash

and can adjust the flash back office degrees

2) Input: AC100 - 240V 2

ENKAY Hat-Prince Geometry Pattern Laotop Protective Crystal Case for MacBook Pro 16 inch A2141(Geometry No.2) Filter-Audio Optical Cables It can only be used1. Please kindly check the model number Axxxx on the back of the laptop before your purchase. 2. Case material: polycarbonate. 3. Totally see through crystal clear hardshell case, the laptop sign can be clearly seen. 4. Two pieces design easy to Install and Take Off. Four rubberized feet keeps your laptop stable and secure. Bottom shell case cover vented for heat dissipation. 5. Fully access to all buttons and features. Specification: General