SoundCore R50i NC True Wireless Bluetooth Earbuds Adaptive ANC + 42dB Noise Reduction Depth: 42dB ANC depth to reduce background noise. Adaptive ANC monitors environmental noise in real time to provide the best noise reduction experience. Multi-mode ANC for different environment to provides the best noise reduction effect. Powerful bass and Clear vocals: 10mm drivers + Exclusive BassUp™ technology for clear sound and powerful bass. Hidden cell phone holder: A hidden mobile phone holder on the case, which is more convenient for surfing the Internet and watching movies. Al-Powered Calls: 4 Microphones + Custom Al algorithm for enhanced calls. Up to 10hrs with a single charge: 10 hours of music play time, 45 hours of total play time. IP54 High level Dustproof, Water-Resistance and Sweat Guard