Wireless USB teaching microphone, anti-interference wireless USB microphone, USB wireless conference microphone, USB wireless microphone

Features:

* 2.4G wireless microphone

*Electronic pointer

* PPT Page Turner

* Air mouse

*Multimedia control

*Flashlight (infrared pairing)

Features:

*Unique 2.4G teaching matching program

*Automatically search for clean channels

*Super strong anti-WIFI interference ability

* LCD display working status

* Automatically shut down after 30 minutes without voice

1. Features

1. It integrates the six functions of wireless microphone, electronic pointer, PPT page turner, air mouse, multimedia control and flashlight. The infrared diode can be used to replace the flashlight LED lamp to realize the infrared pairing function.

2. The LCD screen displays the working mode, volume level, battery level, connection status, and mute status.

3. Special anti-interference design to resist WIFI interference.

4. Working frequency band: ISM 2.4GHz free frequency band.

5. There are 10 preset channels, one-to-one pairing for transmitting and receiving.

6. Audio delay <5mS.

7. GFSK digital modulation/demodulation.

8. SNR 80dB, dynamic range 81dB, receiving sensitivity -85dBm

9. Built-in PCB antenna can reduce cost and development time.

10. The channel quality is not good, and automatically mutes when the bit error rate is high.

11. 16dBm RF output power.

12. The transmission distance is more than 50 meters in open areas.

发射器的按键说明

1. Operation instructions:

YZD1701Tx transmitter has LCD display, 12 function buttons, built-in microphone and external microphone port, internal lithium battery and charging, laser pointer, flashlight, computer recording and other functions. Before using the product for the first time, you need to install the computer amplification software developed by our company. This software has the function of recording in addition to the amplification function.

      1. Pairing

The receiving equipment is installed in each classroom. When the teacher is in class, walk within 3 meters of the receiver to turn on the power of the transmitter and hear the connection prompt.

      2. Adjust the volume (??/??)

          In multimedia mode, short press the volume up/down (??/??) button on the transmitter,

Adjust the volume of the computer system;

In PPT mode, short press the volume up/down (??/??) button on the transmitter to adjust

The section is the volume of the wireless microphone;

       3. Page up/page down (▲/▼)

         In PPT or mouse mode, short press the page up/page down (▲/▼) button on the transmitter, you can

Realize the page turning function commonly used in teaching

      4. Computer player previous/next song (▲/▼)

           In multimedia mode, short press the previous/next (▲/▼) button on the transmitter to

Realize the function of the previous song and the next song of the multimedia player

      5. Computer player play/pause

            In multimedia mode, short press the "P" button on the transmitter to remotely control the computer

Play and pause of the player.

      6. Flying squirrel function

            In mouse mode, fly the transmitter to move the cursor

               In PPT or multimedia mode, hold down the "R" key and fly the transmitter to move the cursor

      7. Play/exit of the slideshow

         In PPT or mouse mode, short press the "P" key on the transmitter to remotely play and pause the slideshow.

       8. One-click black screen for slideshow

          In the slide show mode, short press the "B" button on the transmitter to switch between black screen and play modes

2. Power parameters

          Transmitter built-in battery: 420mA

          Transmitter power consumption: 37mA

 Transmitter charging current: 300mA

          Receiver board power consumption: 30mA

          Supply voltage of receiving board: 3.6～5V

  3. Signal port parameters:

    launcher

             Microphone preamplification: 15dB

              Built-in microphone sensitivity: -44dB

Receiving board:

Standard USB microphone

Standard USB mouse

Standard USB keyboard

4. Status indication:

          Pairing instructions

                     In pairing mode,

        Link instructions

                Charging instructions

        Low battery indicator