Description: 【Versatile Compatibility】Ideal for boats, off road vehicles, golf carts, and outdoor saunas, this waterproof MP3 player is designed to withstand tough environments while delivering audio entertainment 【Advanced Performance】Powered by a high performance 32-bit RISC processor and A4900B main chip with built-in MCU, ensuring smooth operation and reliable functionality for all your music and radio needs 【Comprehensive Media Support】Enjoy multiple playback options including USB (up to 128GB), AM/ radio with RDS (30 preset stations), AUX input, RCA outputs for subwoofers, and support for MP3/WMA/WAV/FLAC formats 【Enhanced Audio Experience】Features DSP sound effects with adjustable bass/treble settings and six selectable sound field modes; delivers powerful output of 4x50W for immersive listening indoors or outdoors 【User Friendly Design】Constructed from ABS plastic and PC materials with a compact 11.5cm diameter; includes a clear 3-inch LCD display for easy navigation plus all necessary accessories in the package Specification: Material: ABS Plastic PC Size Chart: Diameter 11.5cm/4.53inch Package Includes: 1 Boat Stereo Gauge Receiver 1 Manual Note: Please allow slightly errors due to manual measurement and different monitors.