Magnetic design: The microphone end of the loudspeaker is magnetically hidden in the back of , which is easy to use and not easy to lose. Intelligent anti-howling: Using intelligent noise reduction chip, automatic detection of howling feedback, dynamic suppression, and real-time anti-howling. The sound field covers a area, and a classroom of hundreds of people can teach easily. Long-lasting battery life: Faster charging, equipped with Type-C charging interface. Large-capacity battery, battery life up to 25 hours. There is also a power display, so you dont have to worry about running out of power suddenly. Bluetooth connection, wide compatibility: Bluetooth connection, incarnation of a stylish portable small speaker, listen to wonderful music at any time, compatible with laptops/computers, tablets, mobile phones and other devices. Easy to carry: and exquisite design, small and light, can be held in one hand. Equipped with an adjustable lanyard, it can be hung on the shoulder, diagonally or at the waist, making it easier to carry when going out. Specification: Name: Wireless Lavalier Microphone & Loudspeaker Bluetooth version: 5.3 Signal-to-noise ratio: 75dB Frequency response range: 20Hz-20KHz Rated power: 3W Rated voltage: 3.7V Battery life: 25H Color: White Material: plastic Package Contents: 1 x Speaker 1 x Carrying Strap 1 x Charging Cable 1 x Chinese and English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.