Plan-B High-End Wireless Bluetooth Neckband Headphones With Built In Micro SD Memory Card Reader MP3 Player - For Children, Teenagers And Young Adults Revolutionary Deluxe 3-In-1 Bluetooth Headphones - Perfect Fit For Smaller Heads Of Young Teenagers Or Children Insert Micro SD TF Card In Ear Cup And Listen To MP3 Music Directly From Headphone, No More Tangled Wires Use While Bicycling, Exercising, Jogging, Walking, Driving, Etc.; Ultra Crystal Clear Audio Sound Bluetooth 2.0 Technology, Connects To Mobile Phones, Audio Devices Or Bluetooth Laptops USB Charging Port Can Read And Write To SD Card, USB Cable And 3.5mm Cables Included