1.Disclaimer: This is NOT a Bluetooth microphone-the receiver must be connected to a device with microphone port with a 6.34 mm diameter. | 2. Multi-purpose Professional Microphone: Singing Machine's Wireless Microphone features a unidirectional dynamic design, ensuring your voice is crystal clear. Perfect for anyone looking to add a wireless & professional touch to their entertainment setup. | 3. Seamless Connectivity: Enjoy a hassle-free setup with a UHF receiver that minimizes interference. Supports 1 wireless microphone connection per machine. Compatible with audio and DJ equipment, karaoke machines, and more. | 4. What’s Included: Includes a wireless microphone & 6.3 mm receiver plug. Requires 4 "AAA" batteries not included- 2 for the microphone and 2 for the receiver. | 5. Focused Audio Pickup: The unidirectional dynamic microphone ensures your vocals are the highlight, providing a cleaner, more professional sound for live performances, recordings, sports events, church services, weddings, educational settings, and more. | 6. About Us: Singing Machine is a leading provider of consumer karaoke systems. Our high-quality products bring the joy of singing and entertainment to homes worldwide, providing fun and memorable experiences for music enthusiasts of all ages.