The STIX II Pro True Wireless Earbuds with active noise cancellation feature optimized audio drivers, an ENC Quad Pro microphone, and Bluetooth 5.3 for low power consumption. The ENC Quad Pro microphone provides superior audio quality for internet voice calls, while the latest Bluetooth chipset extends talk and playback time to up to 5 hours. The STIX II Pro come with a portable, rechargeable case that can charge the earbuds up to 3.5 times, with a super-fast charging time of 50 minutes. Additionally, they are equipped with integrated smart touch controls for music and calls, as well as an IPX4 water-resistant casing to enhance your audio experience.