Our TDS Message On Demand incorporates a Touch Sensitive Top Panel with LED Display which will allow you to SELECT and PLAY any one of up to 250 Messages ON DEMAND. All MP3 based messages are stored on a supplied 2GB SD Flash card. TDS has a Line Level Output for connection to an external amplifier and a 100V Amplified Output (10W) which can be used to drive up to 10 speakers (1W/100V) that are connected direct to it.