12.4GHz ISM frequency band, 2Mbps high speed wireless transmission of high quality music. 2Adopt real-time digital coding technology, low delay and high transmitting speed, transmission distance up to 200m without barrier. 3Portable stereo speaker adapter, extending the wireless audio player for home entertainment. 4Adopt premium material as well as fine workman, sturdy and durable, long service life. 5Small size and lightweight, stable signal transmission, bringing great using experience.Item Type: Audio Adapter Condition: 100% brand newMaterial: Aluminium alloyColor: BlackFrequency Range: 2400MHz-2483.5MHzTransmission Power: 20dBmReceiving Sensitivity: -90dbmAudio Frequency Response: 20Hz-20KHzSNR: 92dB @ 20Hz-20KHzSampling Rate: 48KHzTransmission Delay: Long Transmission Distance: Approx. 200m(open space)Operating Voltage: 5VTransmitterOperating Current: 240mAReceiver Operating Current: 70mA1 x Receiver 1 x Transmitter2 x Power Adapters2 x Audio Cables2 x USB Cables1 x User ManualPlease note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.