The Assistive Listening System from Hamilton Electronics helps audiences filter out background noise during important presentations. This system comes with one transmitter, six user-friendly receivers with batteries, six ear buds and a durable carrying case. The transmitter can serve an unlimited number of receivers in a 300-foot radius and includes quarter-inch mic and line inputs for integrating various audio sources. The pocket-size receivers feature adjustable volume control and a power on/off switch. This system is ADA-compliant.