FeaturesThe Panasonic RP-BTD5 Bluetooth headphones combines powerful, audiophile-quality sound with wireless listening convenience. 40mm drivers deliver robust, enveloping bass along with crisp, precise mid- and high-frequency tones. The RP-BTD5 quickly and easily syncs with your Bluetooth-enabled device-all it takes is a single touch-while the fold-flat design lets you stow them neatly in a bag or laptop case. Wireless Bluetooth Listening ConvenienceEnjoy your music anywhere and without the hassle of plugs or cords.One-touch Pairing and Easy Touch-key OperationPairing your Bluetooth-enabled smartphone or other device couldn’t be easier. Simply touch it to the earcup and syncing is complete in seconds. You can also easily adjust the volume, receive calls from your smartphone and manage other functions with intuitive touch keys and a microphone designed into the earpad housing.Premium 40mm Big Sound DriversImmerse yourself in deep, realistic bass and clear, natural mid-to-high-frequency sound with individual 40mm audio driver units.Fold-flat Design for Easy, Convenient PortabilityThe ear pads feature a smart 90° swivel mechanism which lets you fold the headphones flat-ideal for travel and everyday portability.Built-in Long-life Lithium Ion BatteryGet up to 40 hours of playback per charge from the high-capacity, rechargeable lithium-ion battery. Charging USB cable included.