QualityQualcomm aptX HD audio decoding format, which supports both 16bit and 24bit audio signals with a sampling rate of up to 48KHz. This provides a natural sound, rich in details and quality.Clear and Stable Voice CallsQualcomm CVC8.0 accurately picks up voices and eliminates background and environmental noise, leading to clearer communication during calls.Strong Magnetic Drivers40mm NdFeB magnetic moving coil units provide a large sound field with powerful bass and enriched voice notes, producing a dynamic sound.Upgraded Chips for Higher ConfigurationFeaturing Bluetooth V5.1 and upgraded Qualcomm QCC3024 chipset, the power consumption is lowered resulting in longer playback, and faster and more stable transmission.Longer Running TimeThe built-in lithium battery has a large capacity which can provide up to 55 hours of wireless listening time.Personalize Your ListeningEDIFIER CONNECT provides a more intelligent and personalized listening experience. It can expand the functions of your headphones so you can select a different sound mode, customize the headphone pairing name, etc.Pairing Two Devices, Easily Switch OverSupport connecting with two Bluetooth devices simultaneously. Easily switch between work and entertainment.Quality CraftsmanshipEDIFIER has a long history in the audio industry. Each product is subjected to a set of reliability test criteria, and many test requirements are higher than national standards to guarantee quality.SpecificationsBluetooth versionV5.1Effective distance10mInput5.0V 1ASensitivity93+3dBImpedance32ΩFrequency response20Hz - 20kHzAudio codecsQualcomm® aptX™ , SBCCharging portUSB Type-CPlayback timeabout 55 hoursCharging timeabout 2.5 hours