Give the performances youve always wanted to. Get precise and accurate in ear monitoring with an LD Systems U508 IEM HP In Ear Monitoring System. The 100 meter transmission range means you can hear your sound in even the largest venues. Your sound couldnt be clearer. With a signal to noise ratio of over 95 dB and total harmonic distortion under 0.3% you can expect superb detail from any good sound source. You can also save yourself hours across gigs. The transmitter and receiver synchronise in seconds using in-built infrared technology.