Folding headset with stereo wireless headset $ 17.23 Bluetooth version: Bluetooth4.2 FM frequency: 87-108MHZ USB charging: DC 5v IN Radio frequency: 2.401-2.480GHz Wireless distance: 10m Frequency response: 20KHz -20KHz| Output Power: 35mW Signal to noise ratio: 88Db Supporting devices: mobile phone/ iPod / Charging time: within 2 hours MP4/ MP3/ CD / notebook, etc.
