JAM Transit Wireless Bluetooth On-Ear Headphones, 30ft Range, Superior Bass, Big Sound, No Cords, Rechargeable Battery, Comfortable Fit, Perfect for Travel, Car, Kids, HX-HP420BK Black On the move: perfect for biking, hiking & traveling. Connectivity Technology: Wired/Wireless Big sound: precision drivers for superior bass Completely wireless: Bluetooth functionality up to 30 feet, without the hassle of cords Rechargeable: party for up to 6 hours without the hassle of cords Speakerphone: integrated speakerphone for hands-free talking