The Liberty Platinum Deluxe Potable Sound System by Anchor Audio features easy-to-use controls, two microphone receivers, auxiliary input, MP3 player and built-in Bluetooth technology that allows you to sync your smart phone, tablet or laptop directly to the sound system. A 125-watt amplifier easily broadcasts sound to audiences of up to 1,500 people, making this unit ideal for auditoriums, classrooms, performances, or sporting events. A 1.9 GHz wireless frequency eliminates interference and allows presenters to roam up to 300 feet as they speak. Includes two portable sound systems, two stands and your choice of handheld or belt pack wireless microphones.