The BEHRINGER's PK108A is an ultra-compact, outstanding 250 watt 2-way PA sound amplifier speaker with built-in media player and Bluetooth *, ideal for live sound, portable PA, karaoke, monitor wedges and worship applications. This amazingly self-contained passive speaker is a powerful MP3 with 250 watts of Class AB power amplifier technology, an integrated 2-channel mixer and dedicated microphone channel, integrated Bluetooth, and a USB stick / SD / MMC card slot. It combines a player and outstanding portability. Convenient power line output allows you to connect multiple PK108 passive speakers. The Fastlink Bluetooth * connection enables true stereo playback with another PK108A and PK110A. SR has never been so easy!