Srhythm Wireless Bluetooth Headphones xNC-25 is made by a top RandD team in the headphone industry. It is a classical product of Noise Cancelling Bluetooth Headphones. It has been tested with a large amount of consumers and earned great reputation. Overall, xNC -25 is an excellent Active Noise Cancelling Bluetooth Headphones. Structure xNC-25 bluetooth headphones is a foldable and can be easily carried around when traveling or outdoor activities. It is durable because of the high-strength plastic and metal connection shaft. Appearance xNC-25 wireless headphones is suitable for business persons and most people because of the classic look. Comfort xNC-25 over ear headphones headwear and ear muff were made be with the extremely soft memory-protein. material ensuring lasting comfort and long wear. The advanced sewing process makes the better sound isolation. Note 1. Connect to standard USB port, and please do not use the fast charge 2. Audio cable is able to use it when low battery 3. Use the 2-pin airline adaptor when required to connect to compatible aircraft seat sockets .