Introducing Isolate SE: the headphones that let you escape. Active noise cancelling blocks out background noise allowing you to focus solely on the music. Bluetooth connectivity gives you freedom to listen wirelessly wherever you go, with up to 24 hours of continuous playback catering for longer journeys. Lightweight, comfortable design with soft cushioned earcups incorporating intuitive controls to handle your music and receive hands-free calls with ease. When you are finished, simply fold them away and store in the hard-shell carry case for ultimate protection.Power supply[tab]Internal rechargeable 400mAh Lithium-ion battery[br]Battery life[tab]Up to 15 hours (ANC Mode), up to 24 hours (BT mode) at 50% volume[br]Charge time[tab]2.5 hours[br]Speaker : driver[tab]40mmØ[br]Frequency response[tab]20-20kHz[br]Sensitivity[tab]110 ± 3db[br]Noise cancellation[tab]-23db[br]Impedance[tab]32 Ohms[br]Connections[tab]Bluetooth:3.5mm stereo jack; USB Type-C (charging)[br]Bluetooth version[tab]V5.0[br]Bluetooth range[tab]Up to 10m (clear line of sight)[br]Weight[tab]225g