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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.

6.6. One group of wired broadcast emergency switching input, and the classroom sound reinforcement will be restored automatically after 5 seconds.

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

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

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

10. Service frequency: 2400-2485mh

12. Output power: 2 × 20W

12. Sensitivity: 90dB ± 2 dB

13. Frequency response: 20Hz-20KHz

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

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

16.2. 4G digital wireless microphone USB receiver

17.2. 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.

18. 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.

19. Volume adjustment, digital LCD display, U-shaped back clip design, easy to use

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

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

22. Signal to noise ratio: ≥ 83db.

23. Receiving sensitivity: 85dB ± 2dB.

24. Working frequency: 2400-2485MHz.

25. Modulation mode: QPSK