The STIX II True Wireless Earbuds are equipped with optimized audio drivers, an ENC Quad Pro microphone, and Bluetooth 5.1, ensuring low energy consumption. The ENC (Electronic Noise Cancelling) Quad Pro microphone provides excellent audio quality for internet voice transmission, and thanks to the latest Bluetooth chipset, offers a playback time of up to 5 hours. The STIX II come with a rechargeable case that can charge them up to 5 times, an above-average playback duration of 45 minutes, Smart Touch for controlling music and calls, as well as a waterproof IPX5 casing to enhance your audio experience.