Supersonic Supersonic Wireless Bluetooth Headphones in Black

High performance headphones with clear, rich stereo music Wireless built-in BT receiver allows you to wirelessly connect your iPad, iPhone, iPod, Android tablet, HDTV, laptop, MP3 player and more Built-in FM radio Built-in microphone allows you to talk when you make a phone call Aux 3.5mm input: gives you the option to connect to non-BT devices Built-in micro USB input for charging Built-in micro SD card slot Adjustable folding design with soft head band and soft-cushioned earcups Music volume control directly on the headphones Noise reduction Built-in rechargeable battery Duration: music 4hrs./talk 4hrs./Standby time: 180hrs./Charging time: 2hrs. BT Version: V 4.2 JR Drivers: 40mm Impedance: 32ohm Sensitivity: -80dBm Frequency Response: 20Hz-20000Hz Frequency Range: 2.4GHz - 2.48GHz Transmission Distance: 33FT. Battery Voltage: 250mAh Battery Charging Voltage: DC 5V 0.5V Item Dimensions: 7.25-in x 7.28-in x 3.74-in Item Weight: 0.00-lbs