Buddy HeadsetMic Stereo - Mobile edition Designed with clear voice capture, durability and comfort in mind Use it for speech recognition, dictation, transcription or any other voice related technology such as VOIP This edition works with Chromebook, iPhone, iPad, Android and other mobile devices with 4 ring audio socket. Adjustable headband to fit comfortably. Stainless steel band can be pulled/pushed in the plastic to adjust according to the head size.