Magnetic design: The microphone end of the loudspeaker is magnetically hidden in the back of the box, which is easy to use and not easy to lose. Intelligent anti-howling: Using DSP intelligent noise reduction chip, automatic detection of howling feedback, dynamic suppression, and real-time anti-howling. The sound field covers a wider 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 don’t 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: Unique 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