Bh-503 Wireless Bluetooth Stereo Headset Headphone Premium Sound Super Bass Range of frequency: 2.4 to 2.4835GHz ISM band Rechargeable lithium battery: 160mAh Enjoy high-quality stereo sound streamed from your compatible phone Stay comfortably in style with over the ear design and an easygoing neckband Control the music player and manage your calls with the media keys