These are digital audio earphones featuring a 14mm speaker and a playback frequency range of 20Hz to 20kHz. - Product Name: Digital Audio Earphones - Speaker Size: 14mm - Sensitivity: 106dB±3dB - Playback Frequency: 20-20kHz - Impedance: 32Ω±15% They feature an automatic retractable function, which easily solves the problem of tangled earphones. While wireless headsets have made great strides, data transmission requires compression and decoding, generally making wired headsets superior in terms of sound quality and latency. If you want to pursue the ultimate audio, video, and gaming experience, we recommend our Znines headset! It's easy to use; just connect it to your smartphone. - To provide HIFI enthusiasts with a powerful balance of bass, mid-range, and treble, these wired headphones are equipped with an audio driver that supports high-resolution playback – a large 14mm speaker! The moment you turn on the headphones at home, you can immediately immerse yourself in the most original and high-quality musical atmosphere. - These wired headsets are equipped with a remote control and microphone button, making it easy to answer calls and play/pause music without touching the screen. Furthermore, the headphones with a microphone adopt a special advanced chip, resulting in clearer call quality and significantly reduced noise interference. High-quality two-way communication can be achieved in scenarios such as casting, gaming, teleconferencing, online classes, and smartphone calls. - Znines headsets feature an ergonomic design that perfectly fits the contours of the ear, providing comfortable wear even during long hours of music listening, gaming, and live streaming. The earcups adopt an ultra-lightweight design, weighing only 3g per ear, securely enveloping the ear and providing the ultimate experience without putting excessive pressure on the ears or neck (however, for the sake of ear health, it is generally recommended to take a break every 3-4 hours). They also feature a Type-C interface, making them compatible with iPhone 15/iPad mini/AQUOS/Xperia/Galaxy/Huawei Mate 60 and all devices equipped with a Type-C interface. Thank you for viewing.