PRODUCT GRADING New > 12 Months Warranty Retail Box WHAT IS IN THE BOX Cowin - Black - SE7 Bluetooth Active Noise Cancelling Headphones PRODUCT DESCRIPTION Professional Active Noise Cancelling (ANC) Technology. Our improved ANC technology significantly quells airplane cabin noise, city traffic or a busy office, help you focus on what you want to hear. ANC works both with and without the audio cable and is great for reducing noise during long trips on a plane or in places with city traffic.Amazing Sound. The 90dB give a deep, powerful, and crisp sound, make your overall listening experience just that much better. The goal that provides Customers with better sound quality, is our constant pursuit.High-quality Built-in Microphone and Bluetooth 5.0. COWIN SE7 provides high-quality built-in microphones for hands-free calls, Which is convenient for you to free yourself from wires. Bluetooth 5.0 promises quick and stable connection with your Bluetooth enabled devices. Bluetooth transmission distance: >15m.The Professional Protein Earpad and Foldable Design. More durability and comfort, Enjoy high-quality, Long-listen comfort. Skin texture, lightweight comfortable around-ear fit you can wear all day long. The foldable Headband is designed for saving your desk and travel bag space. PRODUCT INFORMATION Wireless - Bluetooth 5.0 Transmission distance - >15m Frequency - 20Hz-20kHz Noise reduction depth: -32dB S/N: ≥90dB Distortion: ≤0.5 % Charging time: ≤3.5 hours Life time - 30h Power supply - Lithium battery or Micro USB cable Function spec - Bluetooth5.0, Microphone, APTX, AUX, Active Noise Cancelling