Key Features . Active Noise CancellingiOS and Android CompatibleBluetooth 5.0Side Button ControlsCan be used wired or wireless16 hours battery life . Connect and unleash the full potential of your personal audio device.Rich warm sound incredible automatic noise cancelling unique VU meter and NO WIRES! Everything you loved about the OV-1 now ready to go with any Bluetooth equipped device. You can also answer calls and skip tracks using the tap buttons on the side of the headphones. Qualcomm aptXTM HD audio ensures your Bluetooth wireless enabled device can deliver High Definition (HD) audio. It’s that Meters sound with no wires! Meters Connect - Connect Style TuneAvailable for iOS and Android Meters Connect enables you complete control over your Meters OV-1-B-CONNECT headphones. The app also comes with the option to tune your headphones with a 5 band parametric EQ with simple and easy to use controls. Specific frequencies have been chosen to give you the best possible range of tones. Bass 340Hz Middle 2.6Khz and; Treble. To allow for the additional headroom we have used a class ab amp to achieve optimal signal with minimal distortion. Using an RGB LED you can now control the colour of your Meters as well as control the brightness of the dial when in dark spaces such as long haul night flights. Bluetooth 5.0Uses the latest Bluetooth 5.0 with Low Energy features to give longer listening times to your headsets. The option now to stay updated via over the air updates means your headphones will always be kept up to date with the latest improvements and additional features. Wired or wireless connectionOV-1-B can be used even if you don’t have them charged with both switches off just plug in your supplied cable and away you go enjoying the same quality of audio..