Bluetooth 5.4, automatic pairingThe wireless headphones is equipped with Bluetooth 5.4 chip and supports protocols such as HSP, HFP, A2DP and AVRCP. Compared with Bluetooth 5.3, the transmission speed is faster and more stable, with a latency of (60-70ms). It is easily compatible with iOS and Android smartphones, computers and laptops. In addition, the headphones wireless connect automatically when you remove them from the charging case after pairing the device for the first time. 14.2mm dynamic speaker stereo, clear callRinsmola MD053-The larger diameter driver delivers high fidelity sound with a motor coil that is approximately 15% larger than conventional types, delivering transparent highs and immersive bass. Also, The built-in mic in each Bluetooth earbuds utilizes ENC call noise cancellation to ensure clear and realistic sound. It will allow you to enjoy high-quality conversations anytime, anywhere. 3g ultra-light, comfortable and IP-X7 waterproofThe 3g ear