Compatible with RT4D, RT860, RT900, RT910, and RT910B walkie talkies, this speaker microphone offers reliable plugandplay functionality for quick setup and stable communication. Designed for professional and practical use, it ensures you stay connected clearly and efficiently in demanding environments. Key Features: Simple, plugandplay connection for fast installation and immediate use with listed compatible models. Builtin sensitivity microphone captures your voice clearly, minimizing background noise for smooth communication even in busy or loud surroundings. Powerful speaker delivers crisp, loud audio output so messages are heard clearly over environmental noise. 360degree rotating back clip attaches securely to shoulder straps, pockets, or belts, providing hands convenience and quick accessibility. Performance and Use Scenarios: Outdoor events: Maintain clear communication across large areas without being affected by wind or crowd noise. Warehouse operations: Coordinate tasks efficiently in spaces with machinery noise and activity. Security patrols: Keep contact with team members while staying mobile and hands, ensuring a quick response when needed. Compact and durable, this speaker microphone is built for consistent performance in the field. Its combination of clarity, volume, and ease of wear makes it a dependable communication tool for professionals who require reliable audio in challenging conditions.