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1.2. 0-channel active speaker, built-in power amplifier, 5.5-inch imported full frequency woofer and 2.5-inch imported tweeter

2. It is equipped with HCT environment-friendly microphone socket, 1000 sets of simultaneous use, no serial frequency, short-range frequency matching, strong anti-interference, simple installation and commissioning, clear sound and stable performance.

3. The microphone volume and music volume are adjusted independently.

4. The external plug-in power cord can be upgraded and installed.

5.1 group of lotus audio input and 1 group of lotus recording output.

6.1 group of wired broadcasting emergency switching input, and automatically restore classroom sound reinforcement after 5 seconds.

7.1 channel 6.5mm microphone input socket, DC6V power supply and external power microphone are connected without battery.

8. External USB2 4G wireless microphone and wireless Bluetooth input expansion function.

9. It is applicable to all kinds of multimedia classrooms, electronic classrooms and ordinary classrooms.

10. Iron mesh paint baking protective cover, equipped with original support and wall mounted installation.

11. Service frequency: 2400-2485mh

12. Output power: 2 × 20W

13. Sensitivity: 90dB ± 2 dB

14. Frequency response: 20Hz-20KHz

15. Signal to noise ratio: ≥ 85dB ± 2dB

16. Power supply: AC 220V ± 10% / 50Hz

17.2. 4G digital wireless microphone USB receiver

18.2. 4G anti-interference RF technology, the same wireless microphone, which can be used on different classroom receivers, close start-up automatic frequency matching, voice prompt for successful frequency matching, and no need for special management.

19. 1.8-inch LCD display, showing medium and low battery charging, transmitter and receiver signal locking, volume, PPT wireless page turning function and ACG.

20. The function key adopts metal sealed light touch switch, which has good hand feeling, waterproof, moisture-proof and dust-proof functions, and has stable and durable performance.

21. Volume adjustment, digital liquid crystal display, U-shaped back clip design, easy to use

22. Internal / external microphone switching function, handheld and collar clip.

23. One click mute function allows teachers to communicate with others

24. No audio signal input, automatic noise reduction and mute function.

25. Long distance electronic laser pointer. Ppt page turning function can be added according to user requirements.

26. Lithium battery power supply, environmental protection and energy saving, continuous operation for 12 hours and standby time for 60 days.

27. Transmission range: about 20m depending on the environment

28. Signal to noise ratio: ≥ 83db.

29. Receiving sensitivity: 85dB ± 2dB.

30. Working frequency: 2400-2485MHz.

21. Modulation mode: QPSK