Features 1. Anti-Theft: The system includes a flashing and alarm function to alert riders and deter theft. 2. Retrofit Speaker: The MP3 anti-theft alarm can also function as a retrofit speaker, delivering clear sound for an enhanced riding experience. 3. Practical Design: The motorcycle anti-theft alarm supports Bluetooth and SD card connectivity to meet various audio and usage needs. 4. Stable and Reliable: With a frequency response range of 100Hz6kHz, the alarm provides consistent performance and reliable operation. 5. Durable Construction: Made from lightweight aluminum, the anti-theft system is durable, easy to install, and requires no advanced technical support. Specification Item Type: Motorcycle Anti-Theft Speaker System Material: Aluminum Product Size: Approx. 9 x 7 x 7 cm / 3.54 x 2.75 x 2.75 in Frequency Response Range: 100Hz6kHz Battery Type: Lithium battery (built-in, no TF card included) Battery Capacity: 120mAh Package List 2 x Motorcycle MP3 Anti-Theft Audio 1 x Motorcycle MP3 Audio 1 x Power Cord 2 x Iron Piece 8 x Screws 1 x Control Switch