Levn&trade; Bluetooth Headphones Noise Canceling Headphones Wireless Bluetooth Headphones with Microphone 2.1 Edr CSR Chips M20 Black Design for an active lifestyle,M20 Bluetooth stereo headset combines the stylish design and reliable wireless technology in the ideal mini size units. It's completely accord with the requirement of the fashion life. With the bluetooth wireless technology,M20 gives you the convenience wireless way to enjoy the steaming stereo music transmitted from the bluetooth A2DP. Switching between music and phone calling.M20 allows you answer or make calls with the bluetooth enabled mobile phone while you are listening to music.After you ended the call, the music will follow to be streamed in few seconds. Besides the wireless stereo and mobile hands-free applications, you also can apply the M20 to Bluetooth-enabled PC with the internet messager such as Skype,MSN Messeger or Yahoo! Messeger. Compact design, can be operated by one hand and use noise reduction & echo suppression technology, the sound quality is excellent in any of noisy environment.