KIKI Wireless Headphone MP3 Player Headset iPhone Galaxy Radio FM/Am Micro SD Card TF Slot (Dark Blue) High quality processed and very rugged headphones with excellent sound characteristics. The Built In high performance battery makes a continuous playback time of up to 12Std possible . Headset cable included, can be used for Android or iOS Smartphones Sensitivity: 108db +/-3dB Speaker impedance: 32ohm integrated MP3 player supports MicroSD/SDHC cards up to 32 GB decoding-range: 8 Kbps - 320 Kbps Connections: 3, 5mm Line In, 3.5 mm Antenna In, Micro USB DC 5V