The AmpliVox S1698 is an easy to use and affordable universal digital wireless lavalier microphone system. Its compact and lightweight design is a great solution for expanding your audio needs. Plug receiver into any audio device (microphone / line in jack) with a speaker and amplifier and start talking. Utilizing digital wireless technology, the S1698 operates in the 2.4 GHz range which is completely free of TV and radio interference. The S1698 out performs similarly priced VHF systems with better than CD quality digital audio and delivers dependable operation.