Quality build that guarantees longevity.Built with an alloy frame?? which allows these headphones to be super durable and strong.</br>57mm titanizing diaphragm ensures quicker transient response to electrical signals and enhanced overall sound performance?? delivers dynamic sound?? powerful extra bass.You can hear every beat every word.</br>3D sound effects will give you a lively and stirring experience?? especially for movies.</br>Condenser Microphone with a sensitivity of -42dB makes sure that you sound very clear on phone calls.</br>Padded with soft memory foam rich in protein to ensure long-wearing comfort.</br></br>Product Description</br></br><B>Warranty and Customer Service information</B> <br>1 year warranty from the date of purchase <br>Email Bluedio Customer Service?? get answered under 24 hours <br>To email Bluedio Customer Service: you can click "Account" on Amazon?? click"our Orders"?? find the Bluedio order?? click "ntact Seller". <br> <br><B>Note</B> <br> 1.There is a new added Play/Pause button on T3. <br> 2.Operations such as skipping forward/back and Volume+/- on T3 are contrary to previous headphones. <br> (Specific information please refer to the user manual.) <br> <br><B>Specifications</B> <br> Bluetooth version: 4.1 +EDR <br> Bluetooth transmission frequency: 2.4GHz to 2.48GHz <br> Bluetooth operating range: up to 33 feet (free space) <br> Profiles: A2DP?? AVRCP?? HSP?? HFP <br> Audio resolution: up to 24bit@48KHZ <br> Drivers: ??57mm <br> Impedance: 16?? <br> SPL: 116dB