Fangrui Product Details 1. Children Wireless Microphone Bluetooth Phone Singing Microphone 2. Bluetooth Version: 5.3 3. Battery Capacity: 1800mah 4. Signal To Noise Ratio: 60db Or More 5. Frequency Response Range: 100hz-100khz 6. Output Power: 10mw (headphone Output), 4w (speaker Output) 7. Charging Voltage: 5v 8. Reverb Mode: Echo Sound Effect Reverb 9. Material: Abs 10. Size: About 19.2 X 7.9cm 11. Weight: About 246g 12. Features: 13. Microphone Audio Integrated, Intelligent Noise Reduction, No Whistling, No Noise 14. 5.3 Bluetooth Stable Connection, Monitor Ear, Listen And Sing, Wireless Karaoke, Hifi Speakers, Cell Phone App Recording, Reverb Adjustment 15. Dual Microphone Interconnection, Easy Pairing 16. Compatible With Cell Phones, Laptops, Tablets, Desktop Computers, Wireless Design 17. Built-in Large-capacity Lithium Battery, Durable 18. With Small Night Light Design 19. A Variety Of Ways To Play, Support Audio Playback, Aux Playback, Dual-mike Pairing, Bluetooth Connectivity Playback 20. Five Different Sound Effects, Doll Voice, Male Voice, Female Voice, Strange Voice, Original Voice