It conforms to the human ear engineering design and is pain-free when worn for a long time It adopts DT directional sound transmission 7.0 technology, which not only frees the ear canal, but also makes the sound clear and audible, without sound leakage and strong airtightness It adopts the latest Bluetooth-compatible 5.4 chip, which brings ultra-low power consumption and more stable connection transmission It supports dual-microphone call noise reduction, realizes environmental noise reduction and suppression, restores clear human voice, and truly achieves face-to-face communication There are separate touch functions for the left and right ears, which can switch songs at will, answer and hang up the phone to wake up the voice assistant, start and stop music, and understand your heart better It is compatible with Bluetooth-enabled mobile phones, desktops, tablets, notebooks and other Bluetooth-compatible devices, and supports Windows, iOS, and Android operating systems Specification: Bluetooth-compatible version: Bluetooth-compatible 5.4 Transmission distance: 10m Rated voltage: 3.7V Control type: touch control Earphone battery capacity: 40mAh Charging bin battery capacity: 400mAh Listening time: about 4-6 hours Battery life with compartment: about 36 hours Charging time: about 2 hours Package included: 1 Pair x Earphones 1 x Charging Bin 1 x English and Chinese User Manual 1 x Charging Cable Other things not included