Panasonic RP-BTD10-K Premium Bluetooth Wireless On-Ear Headphones, Black Listen wirelessly via Bluetooth and enjoy premium sound from aptX-enabled devices For quick connect via NFC, simply touch headphones to NFC-enabled smartphone or device Two premium 40mm drivers deliver natural treble and deep bass Adjust volume and receive calls with easy touch-keys Get up to 30 hours per charge with built-in lithium-ion battery