Quick overview MP3 Support: Auto-plays MP3 files. LED Indicator: Red LED flashes during playback. Storage Compatibility: U disks (up to 32GB) & TF cards (up to 16GB) supported. User Controls: Adjustable buttons for song, volume, pause/play, mode. Sound Quality: Superior audio for messages, warnings, etc. Amplification: Onboard 2W mono amp (up to 3W at 5V). Output Options: 3.5mm gold-plated headphone jack. Power: Works with mobile power, 3.7V lithium batteries, or USB 5V. Connectivity: MicroUSB port for power/data. Play Modes: Supports TF card & U disk playback. Applications: Public Announcements, Warning Systems, Entertainment.
