Ausdom M05 Over-Ear Bluetooth Stereo APTX Headphone Wireless Hi-fi Skype Chat with Noise Canceling Microphone M05 headphones can be used both wired (3.5mm standard audio cable) and wireless (Bluetooh v4.0) 40mm speaker drivers, apt-X technology and full range frequency deliver powerful sound, crystal-clear vocals and deep bass Super soft ear cushion provide you no press of long-term comfort. Rotated ear cups for easy storage and transport 400Am rechargeable battery gives you over 20 hours of both talk time and up to 250 hours stand by time Each pair of headphones from Ausdom comes with our 100% satisfaction guarantee and 1 year warranty