10 Zone All-in-One System Master Control Unit with Built-in MP3, USB, and Programmable Timer - China 10 Zone All-in-One System, Mini Speaker | Made-in-China.com
CS-DA500MT 500W 6 Zone Mixer Amplifier with Atenuation/Mp3/USB/FM/Bluetooth
CMX PA-200MC (10 Zone Weekly Timer Mp3 & Remote Microphone)