100% Brand new and high qualityBuilt In microphone， supports bluetooth hands free functionExcellent sound-quality with DSP solution for echo cancellationTechnology Cvc for noise suppressionSupport USB disk and micro sd cardSupport Mp3， wma music formatWith USB charging port for charging mobile phones and other devices (output: dc 5 v / 1a)Design A compact and elegant with led displaySpecificationLimit voltage: 9-26 vPower consumption: 1 wWorking temperature: -20 ~ 50 ¡ã CMusic format: mp3 / wmaSNR> 60dBBluetooth version: v3.0Bluetooth transmission distance: 10-15 mFrequency: 87.5-108.0 MHzFrequency response: 20 Hz ~ 15 KHzUSB Output: DC5V-1A