Contixo KB-2600 Kid Safe 85dB Over The Ear Foldable Wireless Bluetooth Headphone with Volume Limiter, Built-in Micro Phone, Micro SD Card Music Player, FM Stereo Radio, Blue/Yellow Kid safe technology with volume control for safe listening High quality, Bluetooth wireless stereo headphone combo of micro SD card music player, FM stereo radio, audio input/output, phone answering functions Our ear pads and headbands are covered with our specially designed soft-touch comfortable material for your child's comfort 10 hour battery life with a 180 hour standby We believe that you'll love the way these look, sound, and feel Bluetooth Support Profiles: A2DP, AVRCP, HSP, HFP Transmission Range: Up to 33 feet Talk Time: Up to 10 hours Music Playback Time: Up to 10 hours Standby Time: Up to 180 hours Charging Time: 1.5 hours Speaker Frequency Response: 20 Hz - 20,000 Hz Speaker Diameter: 40 mm Speaker Impedance: 32 ohm Radio Frequency Range: 87 Hz - 108,000 Hz Charging Port: Micro USB Type B Built-in Microphone. Built-in FM Radio. Built-in Rechargeable lithium polymer battery. Offered in Six Awesome Colors. Weight: 4.8 ounces Micro SD Card Compatible (Not included) Music Player FM Stereo Radio Audio Input &amp; Output Phone Answering Functions Suitable for Children Ages 3+ Compatible with Nearly All Bluetooth Devices 1 x Contixo Wireless Bluetooth Headphone 1 x USB Charging Cable 1 x 3.5mm Audio Cable 1 x User Manual