Features: Upgrades your headphones with these replacement speaker unit for superior listen experience. These quality 33ohm speaker is suitable for QC15 QC25 QC35 QC3 AE2 OE2 headphones, providing clear and realistic sound. Perfect for music lover and movie enthusiasts, these replacement speaker are for users of different headphones. Elevates sound experience and immerses yourself in your favorite content. It is easily install and just few step to replace your headphone speaker driver; Elevates your headphones with these replacement speaker unit for improved listen experience. These 40mm headphone speaker driver deliver clear and realistic sound, providing nice sounds experience. Specifications: Material:Metal+ Plastic Diameter:Approx.40mm/1.57in for QC15 QC25 QC35 QC3 AE2 OE2 Headphone; Impedances:33Ohm Sensitivity:20mw Package Includes: 2pc Speaker Driver note: Please allow 1-2cm errors due to manual measurement,please make sure that you donot mind befores you order. Due to the differences between different monitors, the picture may not reflect the actual item color.