Add realistic sound to your custom brick builds with this compact wireless speaker module. The white, brickcompatible housing measures 4x4x3.2cm and fits into standard building block layouts while delivering reliable Bluetooth audio for MOC projects. Key benefits Seamless integration: Brickform design and standard mounting system preserve the look and feel of your builds while providing sound capability. Simple wireless streaming: Bluetooth connectivity lets you play music and sound effects from phones, tablets, and other devices without extra wiring. Easy installation: Includes a 21cm connecting cable and attaches to a building block battery case for quick setup. Flexible power range: Operates on 5.07.4v DC for compatibility with common hobby power sources. Compact yet capable: Small footprint allows placement inside vehicles, trains, buildings, and other models without disrupting scale or style. Features and specifications Size: 4x4x3.2cm (approximately 1.57 x 1.57 x 1.26 inches) Cable length: 21cm Color: White Power: 5.07.4v DC Wireless: Bluetooth for audio streaming Mounting: Standard brickcompatible mounting system Includes: Connecting cable for straightforward installation Pairing name: JiMuYinXiang How to use 1. Connect the speaker to a building block battery case. 2. Turn on Bluetooth on your phone or other device. 3. Search for the Bluetooth device named JiMuYinXiang and pair. 4. After successful connection, play audio wirelessly from your device. Practical applications Model trains: Add engine sounds, station announcements, or ambient track noise to a train layout. Custom vehicles and robots: Mount the speaker inside a car or robot chassis to provide horn sounds, alerts, or music. Interactive displays and dioramas: Enhance buildings, theme scenes, or exhibit pieces with background music and sound effects. This speaker module provides a straightforward way to add real sound to your custom builds while maintaining visual consistency with standard building blocks.