AUSDOM Bluetooth Headphones Over-ear Stereo Wireless Headset with Microphone for Music Streaming M04 M04 [Upgrade version] headphones can be used both wired (stereo audio only) and wireless for streaming music Save 10% each on Qualifying items offered by Amtopone when you purchase 1 or more.Can be used both wired (via the 3.5mm audio cable) and wirelessly(via Bluetooth 3.0 EDR) Full range audio spectrum (20Hz-20kHz) for deep bass, all the way to crystal clear high frequencies Built-in 400Am rechargeable battery provides you about 18 hours for both talk and audio play time Excellent over-the-ear design for noise isolation guarantees the clarity of sound