It is a professional business headset designed for thewhite-collar class. It is an ideal headset for video-conferencing,on-line chatting, presentations etc. The headset is petite insize which is highly portable. A noise-canceling microphoneis paired up with the headset to let you deliver clear voice transmission.Ergonomically DesignedThe behind-the ear design is ergonomically fit to your ears. It delivers optimal sound while maintaining users' comfort perfectly.Noise-canceling MicrophoneThe microphone collects all the sound waves from the same direction. It can deliver accurate messages effectively in any on-line chatting.Petite and PortableThe headset is petite in size and very convenient in use. Just put it in your pouch, and let it becomes you best companion. Rotatable Ear HookThe extra-soft ear hook provides superior comfort to your ears. It can be rotated to fit the curve of your ears securely. It greatly enhances the flexibility of the product.Specifications: Speaker diameter: 15 mmFrequency response: 20 - 20,000 HzImpedance: 32ΩSpeaker Sensitivity: 105dBDimensions: 18 x 20 x 84 mm Authorized E-Blue DealerDon't settle for mediocre product and absence of customer service. With us youget authentic E-Blue product along with 1-Year manufacturer warranty.Please feel free to contact me with any questions at 1(917)578-6456.