Sonata Noise Cancelling TWS Earbuds have two types of noise cancelling modes: Transparency & Active Noise Cancelling modes. Transparency mode amplifies the surrounding sound to hear some situational sound around you and Active Noise Cancelling mode will tune out surrounding noise and lets you focus on your music, meetings and more These have fast & ultra-stable True Wireless Stereo connection with Auto-Pairing and Auto Power-On for easy use and multi-function buttons & dual microphones for hands free operation. Touch the multi function button three times on either side to activate Siri iOS devices or Google Assistant Android devices and works as single or a pair. Enjoy playing time of 4.5 hours on a single charge & up to 18 hours with charging case and a charging time of 1.5 hours for earb