Amplivox Adjustable-height cordless public address sound system lectern Adjustable-Height Cordless Public Address Sound System Lectern, Medium Oak For indoor or outdoor sound amplification Powerful 50W multimedia ready amp with stereo input for computer/CD, tape and three mics, outputs for tape recorder and up to four speakers Professional handheld mic with flexible gooseneck and shock mount mic holder Runs on ten D batteries (sold separately) for up to 200 hours talk time, APL-S1460 AC Adapter (sold separately) or converts to a rechargeable system with APL-S1460 AC Adapter and APL-S1465 Nicad Battery Pack (both sold separately) UL/cUL Listed Made in U.S.A. Height adjusts easily from 36" to 44" with one-hand pneumatic dial control.