AUSDOM M04 NFC Wireless Bluetooth 4.0 Stereo Over-ear Wired + Wireless Headphones with Built-in Microphone, Black & Red Upgrade M04 headphones - NFC function allows to connect your NFC-compatible devices in a fast and convenient way Can be used both wired (stereo audio only) and wireless - Optional connection via 3.5mm audio cable for streaming music without worrying battery dead Over-the-ear design with soft ear cushions for excellent noise cancelling Build in 400 mah rechargeable lithium battery guarantees 18 hours for both talk and audio play time Stretch headband, rotatable headset, soft cushion & lightweight - Good for travel and long time comfortable use