KIKI Wireless Headphone MP3 Player Headset iPhone Galaxy Radio FM Micro SD Card TF Slot (Black) 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