Sony WH-1000XM4 Wireless Premium Noise Canceling Overhead Headphones with Mic for Phone-Call and Alexa Voice Control, Silver WH1000XM4 Industry-leading noise canceling with Dual Noise Sensor technology Next-level music with Edge-AI, co-developed with Sony Music Studios Tokyo Up to 30-hour battery life with quick charging (10 min charge for 5 hours of playback) The WH1000XM4 Touch Sensor controls to pause play skip tracks, control volume, activate your voice assistant, and answer phone calls. Speak-to-chat technology automatically reduces volume during conversations Superior call quality with precise voice pickup Wearing detection pauses playback when headphones are removed Seamless multiple-device pairing Adaptive Sound Control provides a personalized listening experience Updated design relieves pressure for long-lasting comfort. Frequency Response 4Hz-40,000Hz