For MacBook Air 13.3 inch A2179 / A2337 ENKAY Spaceman Pattern Laotop Protective Crystal Case(Spaceman No.3) Tag-12.9 inch 2015 Prevent the resonance between the

Prevent the resonance between the earbud shell and the ear bone

40HQ: 750 cartons * 500 pcs = 375000 pcs

and you can take this speaker with you

Impedance: 16 Ohm

For MacBook Air 13.3 inch A2179 / A2337 ENKAY Spaceman Pattern Laotop Protective Crystal Case(Spaceman No.3) Tag-12.9 inch 2015 Prevent the resonance between the1. 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