FEEL THE SILENCE:Enjoy the Hi-Fi Stereo Sound.JAPANESE ENGINEERING:Advanced audio development tuned by Aiwa engineers offers great sound for its size.ACTIVE NOISE CANCELLING: HOW IT WORKS:Turn off the exterior noise with the ANC buttonSpecifications:- Active noise cancelling for silencing noisy city trafffic,cabin noise or a busy office- Bluetooth connection.- Mic for calls,smart talk ,work with all iphone models and other smartphones.- Featuring independent on-board controls,manage tracks and receive calls- Connect wireless or via 3.5 mm audio cable- Bluetooth v 4.0- Bluetooth solution: CSR8635- Bluetooth profile A2DP/AVRCP/HSP/HFP- Operating distance:10M- Rechargeable battery- Li-ion polymer battery 290 mAh- Music playback and talking time: 18 hours- Charging time: 3 hours