FeaturesUniversally compatibleBattery life: up to 20 hoursMicrophone / remote / volume controlBluetooth or Lightning cable connectionActive noise cancellationThe Nura NuraPhone Wireless Bluetooth Noise-Cancelling Over-Ear Headphones are the world\'s only headphone that automatically learns and adapts to your unique hearing.Nura Personalised Sound automatically measures your hearing in 60 seconds by measuring otoacoustic emissions (OAEs). Answer calls on your Nuraphones, with external microphones for voice clarity. A music-activated cooling system. TeslaFlow uses Tesla valves (a flow with no moving parts) to circulate warm air out of the ear cups. Choose if you want to hear conversations and your surroundings, or tune out everything except your music. Activate Social Mode and outside sounds pass into your nuraphones.  Touch the buttons on each of the nuraphone\'s ear cups to control your music, without having to open your phone and interrupt your listening. And with a single and double-tap, you can choose up to 4x functions.Enjoy clear conversations, even when it\'s noisy, with external microphones for calls. Make and receive calls with your nuraphones using Bluetooth or a Lightning cable.In the box: NuraphoneTravel CaseAnalog CableUSB-A Charging CableMulti-Sized Ear Tips