The Behringer MPA100BT Portable PA System With Wireless Microphone is an all-in-one system perfect for audiences of up to 300 people and environments such as parties, schools and presentations. With full Bluetooth connectivity, users can simply connect their device and stream music effortlessly through the 100-watt loudspeaker. The powerful 6-inch woofer combines with a high-resolution tweeter to deliver high-quality sound thanks to the inclusion of Class-D amplifier technology. The MPA100BT operates via a power supply or the onboard battery pack which offers up to 20 hours of continuous use with each charge. The PA system comes equipped with a 4-channel mixer for easy level setting and even includes a wireless microphone for ultimate flexibility.