The APS 25-VL1 powered speaker system is a fully self-contained wireless sound reinforcement system with a single VHF wireless bodypack transmitter. Incorporating a 20 watt amplifier, the APS 25 is a rugged, 2-way speaker with a 5.25" shielded woofer and a 1" wide-dispersion tweeter that produces clear detailed sound for all corporate, educational and commercial applications. The APS 25 includes a Master Volume control and Tone control to reduce feedback. Individual level controls for each of the four inputs - two wireless, one wired mic level, and one line level-giving you more ways to configure your system. The speaker"s variable line level output lets you daisy chain multiple speakers. The high gain mic input shorts automatically to reduce noise when no mic is plugged in. Included with the APS 25 is the Auto On-Off circuitry triggered by any audio input signal for hands-off system startup; a high impact case for reliability, and dual-voltage (110/220V) switching to facilitate installation and use. The speaker can be used free standing, stand-mounted (5/8x27 threaded holes on the bottom and side) or wall-mounted with the supplied U-mount bracket. The APS 25-VL1 includes a APS-VR VHF receiver module and the 31LT bodypack with the EX-503 lavalier microphone