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Description:E3 Bluetooth box let you have fun in music world .It deliveries analog audio signal or send digital TV audio signal via Bluetooth connect with Bluetooth speaker， Bluetooth headphone . It can pair with two Bluetooth device at the same time . Features:Music/Voice switching， freely and relaxed.Auto paring， don't need manual operation.Having compact and human-friendly design， beautiful outlook， it is very convenient to carry.It can transmit the audio/voice signal from very long distance.Super Clear and fluent speech effect.The inner Li-battery can bear long working time and has low power consumption.Support Bluetooth receiving devices such Bluetooth speakers， headset， receiver etc.Specification:Bluetooth : V4.0 SystemDistance : 20mStereo Music signal : supportPCM Digital signal : supportAVRCP : supportStereo music : supportWorking time : 7-10hoursCharging time : about 2 hoursCompatible products: Syllable G05/G15/G01 Bluetooth headphones; Beyerdynamic /Beyerdynamic /AKG/ Grado /Sony Bluetooth headphones， etc.Package:1×multi-functional Bluetooth Box Transmitter1×3.5mm audio able1×USB cable