Upgrade the sound for your iPhone The Edifier i285 iPhone earsets are specifically designed as a high quality audio upgrade for iOS devices. As opposed to generic earphones for smartphones, the i285 comes with full controls and functionality as the iPhone original headsets. Technical Details FREQUENCY RESPONSE: 20Hz～20kHzIMPEDANCE: 32ΩCONNECTOR TYPE: StraightSOUND PRESSURE LEVEL: 105dBCABLE LENGTH: 1.3mWEIGHT: 0.013KGCONNECTOR: 3.5mmINLINE CONTROL: YesDRIVER DIAMETER: 10mm Buy with confidence from world's second largest manufacturer. Edifier is the world's second largest consumer audio manufacturer. Despite not well-known in the US, Edifier has great market shares in Asia, Europe and South America. Edifier is the parental company of STAX, one of the most expensive headphone brands in the world. Edifier has incorporated similar technology and design concept into its consumer earphones and headphones, and strives to make the best sound affordable to everyone.