Give the performances youve always wanted to. Get precise and accurate in ear monitoring with an LD Systems U308 IEM 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 90 dB and total harmonic distortion under 0.5% you can expect superb detail from any good sound source. Earphones are not included with the IEM set so you can use your own favourite headphones or earphones.