1.This product USES professional chip launch, quality , and audio and mic input paragraphs set a separate pin input signal targeted treatment respectively, will minimize the loss of sound quality2.Power level 4 adjustable, can the suitable emission power according to different situation, not to be noisy around, the use sex is stronger3.Using dedicated transmitting antennas, the firing range is from the antenna, which is stable and 4.The noise is less than 60dB, which is more than 60dB, which can avoid the interference of the noise and the noise5.Single double-channel mode one-click flexible conversion, easy to use, operable,Electronic volume 16 adjustable6. AUX (audio) input interface, MIC (microphone) input interface, locking key functions7. Frequency 60-108MHZ tunable (or fixed frequency point)8.Launch distance:Indoor use: the radius is about 10-20 (Through the wall, the transmission signal will be blocked)Urban section usage: the radius is about 100-150 In the open area, there is no environmental impact: the perfect effect is 250 in radiusfrequency range:60-108 MHZworking power supply : -5c 3.7v 1000 mahFrequency stability :+ 10PPMFrequency stability and frequency step: 0.1 MHZCharging time:about 5 hoursNoise/harmonic radiation less than 60dBAudio distortion:less than 1%The frequency response:50HZ-1500HZThe input level :less than -15dBVThe Signal to noise less than 60dBSupport for MP3 file playbackColour:blackMaterial:plasticPackage Contents:1 x Transmitter player1 x CableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.