As a Bluetooth headphone amp Equipped with high-performance independent DAC and flagship Bluetooth chip QCC5141, you could connect it to your music player, your phone, or PC through Bluetooth function and get a Wi-Fi sound. As true wireless earbuds, It supports aptX adaptive, no matter whether you are doing sports and fitness, playing games and watching TV, or you are driving, taking a meeting, or chatting with somebody, all of these situations, you would enjoy a clear and hi-res sound with high sensitivity and low latency. Bluetooth 5.2 Support for aptX adaptive allows you to listen to 96kHz/24-bit high-resolution audio all with lower latency. And aptX voice enables 32kHz super wideband voice calls for true high-definition calls over Bluetooth. PS: Bluetooth formats supported: SBC, AAC, aptX, aptX adaptive. Third-gen TWS For greater compatibility with various Bluetooth devices, the UTWS5 earbuds hook is utilized on Qualcomm's third-gen TWS Mirroring. It brings lower latency and more reliable connections. 30 hours total battery life. The charging case not only has an enormous 800mAh battery that can provide up to 30 hours of battery life but is also capable of wireless charging. PS: about 8 hours per charge, total battery life of 30 hours with the charging case good for 3-4 charges.