... 2. 2.4GHz Wireless transmission frequency 3. Fashion Colorful design Hi-Fi Wireless Headphone Features:1. Hidden microphone design, in the use of ... , unique, style with the clothing and easily become street focus. Headphone specifications:Button Functions: Volume +, Volume -, the power switch button ... (L×W×H) : 48.5x20x11mm System Requirements: WindowsXP,WindowsVista,Windows7 Hi-Fi Wireless Headphone