Bluetooth on-ear wireless headphones support profile A2DP - Advanced Audio Distribution Profile. Foldable headphones have cushioned ear pads for premium sound and comfort. On-ear controls: volume, play/pause/phone answering/power/pairing. Features: built-in microphone, 20Hz - 20kHz frequency response, 32ohms nominal impedance, 106dB at 1kHz SPL sensitivity, micro USB port for battery recharge, 33 Ft. wireless range, LED pairing/power indicator, and built-in rechargeable lithium ion battery (5 Hr. play time). Includes: USB cable, 90 day warranty, and user guide.