1. 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. 2. 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. 3. Long-lasting battery life: Faster charging, equipped with Type-C charging interface. Large-capacity battery, battery life up to 10 hours. There is also a power display, so you don't have to worry about running out of power suddenly. 4. 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. 5. Easy to carry: Unique and exquisite design, small and light, can be held in one hand. Name: Wireless Lavalier Microphone & Loudspeaker Bluetooth version: 5.3 Signal-to-noise ratio: ≥70dB Frequency response range: 180Hz-18KHz Battery: 2000mah Use Life:8-10 Hour Colour:White/Black Material:plastic Package Contents: 1 x Megaphone Host 2 x Microphone 1 x USB 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.