USB: You can download MP3 o files by connecting to a computer via a MICRO-USB data cable. Charging indicator light: The indicator light stays on during charging and turns off when fully charged. Play indicator light: It remains on during voice playback. Supports downloading multiple voice files; each file plays when triggered. 8MB memory, with approximately 1 minute of o storage per 1MB; volume is adjustable; the product includes a 3.6V rechargeable 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 duration: 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 differences in display screens may cause slight variations in color between the image and the actual item. Measurement allows an error of +/- 1-3 cm.