Finally, presentations without background noise! Who hasn't experienced this: the sound was clear and crisp at home, but now in the lecture hall, there's buzzing and chirping coming from the speakers. There's no time for troubleshooting. The Palmer vils provides a reliable solution; it's a line isolator box that separates the ground potentials of your laptop, media devices, and the sound system. The Palmer vils features two unbalanced RCA inputs. You can use a standard Y-cable with a 3.5mm jack to connect to your laptop's headphone output. The vils combines both stereo channels into mono, so you only need one available microphone input to connect to the sound system. The Palmer vils is extremely easy to use. Its passive operation means it requires no power supply; a resistor network and a transformer ensure optimal level and impedance matching while simultaneously balancing the signal. This way, even with longer cable runs, there are no disturbances. With the Palmer vils, you can finally trust that your presentations in the lecture hall will sound just as clear and crisp as they do at home.