GBSELL Wireless Bluetooth Warm Headphone Headset Music Audio Hat Cap with Speaker & Mic Hands Free Outdoor Sport,Compatible with iPhone, iPod, Galaxy, Blackberry, Android,Other Smart Phones Knitted material, fashion and keep warm with answer the phone in winter Set-in MIC, available for cell phone to transmit the speaking phone to your audio devices directly so that the user can hand free answering Set-in Li-ion chargeable battery, charge via USB Cable, long stand-by time. V3.0+EDR Bluetooth version,available for most of devices with bluetooth function. Package Content:1PC Warm Bluetooth Smart Hat(without retail package);1PC Instruction Manual;1PC Charging Cable