Produk ini bergaransi 6 bulan Function * common ground noise * current sound * power interference * video broadcasting system * simultaneous interpretation of teleconferences * mixer connected to computer, LED video, camera, other systems. * protect front and rear equipment Main functions: Isolate common ground interference between equipment, eliminate current sound, filter effect, acoustic noise reduction to determine whether the noise is caused by common ground: 1. Connect the headset to the vehicle-mounted MP3 and AUX (3.5m interface) of vehicle-mounted navigation. If there is no noise heard from the headset, it can be confirmed that the noise of vehicle-mounted equipment is caused by common ground. 2, use would battery power of mobile phone, or MP3 audio line don't pay attention to mobile phones, MP3 any power supply is connected with the car, such as phone), connected to the AUX instrument panel on the music and play mobile phone, so there is no noise, noise can be confirmed before was for a total of 3, computers, power amplifier, stereo, CD: use passive earphone plugged in the computer audition has no noise, the use of mobile phones in power amplifier, stereo audition, if there is no noise, separate audition both basic decision is caused. 4, after starting the car, the installation of power amplifier has the sound of current, some models will also appear the throttle larger, more current sound, this product can solve this problem. 5. If there is an electric sound between the power amplifier and the speaker or the stereo, this product can be installed between the power amplifier and the speaker. 6. If the laptop connects to the projector and the power amplifier produces noise, it can connect to the adapter power supply or use the battery. At this time, the noise of the power amplifier will disappear after unplugging, or the noise of the projector will disappear after unplugging.