... with battery, suitable for supermarket, chain store, retail shop, media company, convenience store, airport, bus station, etc.DrawingKey Function1. Real energy ... , etc.2. Play from: --Secure digital card (SD card) --USB flash drive --Built-in memory3. Upgrade contents of the memory ... 8GB Built-in Flash Memory: Optional, confirm before production USB: High speed USB 2.0 (Host)4. Play Mode: Press the play ...