PTUNA Foldable Wireless Bluetooth Headphones Overview Enjoy a superior wireless experience with PTUNA Over-Ear Headphones. Exclusive technology delivers deep, immersive sound at any volume while a dual microphone system is optimised to provide clear calls, even in windy or noisy environments. Designed to optimize your phone calls, an advanced microphone system with HD voice and adaptive audio adjustment provides clear calls. And enhanced sidetone makes your voice sound more natural, as if you weren't wearing headphones.Function&Instructions 1. Long-press "ON/OFF" to turn on the headphones, and there is an voice reminder: bluetooth mode is ready to pair. 2. Long-press "volume+"/"volume-" to adjust the volume. 3. Press "volume+"/"volume-" to select next/last track . 4. Press "M" to select FM radio mode, and press "ON/OFF" to search radio automatically. 5. Compatible with Computer/TV/Laptop/iPad/Tablet/iPhone/Galaxy/Note and more Tech Specs: *Bluetooth V4.0+EDR class2. *The newest version of A2DP1.2 and AVRCP1.0 profiles supported. *Support BT Headsets and Handsfree profile(HFP1.5). *RF Frequency range: 2.402-2.480ghz, 2.4g ism band. *Radio performance: 84db/0.1%BER. *Frequency response: 20hz - 20khz. *Signal to Noise Ratio(SNR): 95dB. *Battery: Rechargeable 400mAh Li-po battery. *Charging time : 2-2.5 hrs. *Talk/music time: up to 10 hrs. *Operating temperature: -20℃-55℃. What's in the Box *PTUNA Foldable Wireless Bluetooth Headphones *Micro to USB Charging Cable*User Manual
