The Sound Blaster E3 is a headphone amplifier that gives you high audio quality performance with music streaming wirelessly to your smart mobile devices. It supports USB audio streaming from the smart mobile devices as well, providing a higher grade of quality than Bluetooth. Device Type: Sound card Enclosure Type: External Interface Type: USB / Bluetooth Sound Output Mode: Stereo Signal-To-Noise Ratio: 112 dB System Requirements: Apple MacOS X 10.6 or later, Android 2.3 or later, Apple iOS 5.0 or later, Microsoft Windows Vista / 7 / 8 / 8.1, Apple iOS 7 or later Manufacturer Warranty: 1 year warranty Device Type: Sound card Form Factor: External Interface Type: USB / Bluetooth Sound Output Mode: Stereo Signal-To-Noise Ratio: 112 dB Features: Headphone Amplifier, CrystalVoice, SBX Pro Studio Interfaces: 1 x audio line-in - mini-phone 3.5 mm 4-pole 1 x headphones - mini-phone stereo 3.5 mm 1 x microphone - mini-phone stereo 3.5 mm Cables Included: 1 x audio cable 1 x USB cable OS Required: Apple MacOS X 10.6 or later, Android 2.3 or later, Apple iOS 5.0 or later, Microsoft Windows Vista / 7 / 8 / 8.1, Apple iOS 7 or later Service & Support: Limited warranty - 1 year