Numark HF Wireless | High Performance Wireless On-Ear Headphones with Built-In Mic Bluetooth 4.0 technology with NFC pairing for superior wireless streaming Wireless range up to 30 feet, music playback time up to 10 hours Compact, collapsible design with built-in microphone Onboard microphone, volume and track search controls for enhanced Bluetooth control Operate in wireless mode or use detachable cord for wired mode