1. USB: Download MP3 o files by connecting to a computer via a MICRO-USB data cable. 2. Charging indicator light: The indicator light stays on during charging and turns off when fully charged. 3. Play indicator light: The light remains on during voice playback. 4. Supports downloading multiple voice files; each file plays when triggered. 5. 8MB memory, with approximately 1 minute of o per 1MB; adjustable volume; includes a rechargeable 3.6V button lithium battery, chargeable via USB. Model: JR1652 Compatible o device types: Speakers, digital-to-analog converters, players Memory size: 8MB Product name: USB sound module box Sound format: MP3 Playback time: Up to 8 minutes Functions: Sound playback, greeting messages, o recording Battery: Rechargeable 3.6V button lithium battery (included) Color: White Material: Plastic + PCB Version: B: Keyboard Version Package Contents: 1 x USB sound module box Note: Light reflection and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.