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 quality 2.Power level 4 adjustable, can the suitable emission power according to different situation, not to be noisy around, the use sex is stronger 3.Using dedicated mitting 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 noise 5.Single double-channel mode one-click flexible conversion, easy to use, operable,Electronic volume 16 adjustable 6. AUX (audio) input interface, MIC (microphone) input interface, locking key functions 7. Frequency 60-108MHZ tunable (or fixed frequency point) 8.Launch distance: Indoor use: the radius is about 10-20 (Through the wall, the mission 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 radius frequency range:60-108 MHZ working power supply : -5c 3.7v 1000 mah Frequency stability :+ 10PPM Frequency stability and frequency step: 0.1 MHZ Charging time:about 5 hours Noise/harmonic radiation less than 60dB Audio distortion:less than 1% The frequency response:50HZ-1500HZ The input level :less than -15dBV The Signal to noise less than 60dB Support for MP3 file playback Colour:black Material:plastic Package Contents: 1 x mitter player 1 x Cable Only 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.