Description: microphone: Pickup: Back-pole condenser microphone Working voltage: 3.7V Frequency range: 20HZ-20KHZ Battery Specifications: 1200mAh Power adapter: DCSV1000MA (can be used with mobile phone chargers) Charging time: 3.5-4 hours Speaker specifications Bluetooth version: version 5.0 Call diameter: 57MM Calling power: 6W Working voltage: 3.7V Frequency range: 20HZ-20KHZ Reverb: Echo sound effect reverb Power adapter: DC5V1A (can be used with mobile phone chargers) Battery Specifications: 2000mAh Charging time: about 2.5 hours Related Products:voice amplifier,megaphone,speaker with microphone,voice amplifier for teachers,bullhorn megaphone,voice amplifier wireless microphone,portable pa system,teacher microphone for classroom A mini machine with a stylish appearance and simple operation for both kids and adults to enjoy. Bluetooth speaker is equipped with a high-performance driver and an advanced digital signal processor, which make the sound clearer and avoids annoying mike feedback. Instant pairing to your mobile devices with great stability. The wireless mic will auto connect with the speaker when power on, distance up to 32 feet.Supports a TF stored with MP3 songs. Built-in rechargeable battery, ensures 5-10 hours fun. Quicker charging, and long-time lasting. Having fun without any interruption.Birthday party, meeting, classroom, outdoor activities...This portable Bluetooth speaker and wireless microphone will meet all of your "fun singing" needs. Come with 4 kinds of magic voices, fun and interesting for kids. The LED lights with the rhythm of the music, creating a fun atmosphere. Internal vocal removal function so you can sing to your favorite songs! Headphone output port on back. for singing practice, home family, small enough to bring when you travel. With this ultra-portable machine, everywhere is the stage. It is a great birthday or festival gift for your kids, friends or family. A great Christmas gift for the young and the old.