The metallic black Pioneer DJ HDJ-X5BT are Bluetooth over-ear DJ headphones offering flexible functionality and extended frequency reproduction for DJs on stage or at home. They support AAC, aptX, aptX-LL, and SBC audio codecs, and offer a Bluetooth range of up to 32.8 feet. An internal rechargeable battery provides up to 20 hours of operating time, and can be recharged in approximately three hours via a USB connection with the supplied USB cable. Tested to MIL-STD-810G standards and designed to swivel and fold, these headphones are durable and easy to transport. 40mm dynamic drivers deliver a frequency response of 5 Hz to 30 kHz, making the HDJ-X5BT well suited for the wide range of frequencies present in electronic music. A detachable 3.9' coiled cable and threaded 1/4" adapter are included for easy connection to mixers, audio interfaces, and non-Bluetooth mobile devices. The built-in microphone and remote controls allow convenient integration with smartphones and tablets.