- Valcom Messenger USB digital messaging system - Traditional message-on-hold systems utilize cassette tapes that typically place limits on the lengthof music and messages available. The Messager USB, a state-of-the-art digital audio playback device, eliminates time limitations and provides an infinite opportunity for continuous background music or music/message on hold playback - Supports MP3 file playback without any special drivers or software - Continuous playback of music and/or messages - Supports flash drives up to 4GB - High quality audio playback up to 128Kbps - Built-inmonitor speaker - LED status indicator - Free generic on-hold message - Free personalized on-hold message (contact Valcom 800-825-2661) - VALCOM POWER UNITS (0) VCV9988