2.4G Wireless Microphone Audio Signal Transmitter Receiver Module
Sending Send Receiving Receive Board
Product Features:
1> Exclusive 2.4G encoding and decoding encryption and decryption algorithm, with strong transmission confidentiality ;
2> Wireless transmission distance 20-25 meters (open and unobstructed environment testing) ;
3> Adopting adaptive frequency hopping communication algorithm, with strong anti-interference ability;
4> Support reverberation and noise reduction functions ;
5> Easy pairing and connection ;
6> Low latency (15-20ms) ;
Technical Specifications (Transmission Module)
Working Voltage: 3.3V-5.0V
Working Current: 14mA
Working Frequency: 2.400-2.485GHz
RF Output Power: +6dbm
Antenna Type: PCB board mounted antenna
Audio ADC Sampling Rate: 16Bit/48Khz/64Kbps
Audio ADC Frequency Response Range: 20Hz-20KHz
Microphone Sensitivity: -36db
External dimensions: 24.5x15.3x3mm
Weight: 3g
Transmission Delay: 15-20ms (The delay between the input audio signal at the transmitting end and the output audio signal at the receiving end)
Communication Distance: 20-25 meters (open and unobstructed environment testing)
Transmission Mode: Send
Technical Specifications (Receiver Module)
Working Voltage: 3.3V-5.0V
Working Current: 13mA
Working Frequency: 2.400-2.485GHz
RF Sensitivity: -94dbm
Antenna Type: PCB board mounted antenna
Audio DAC Sampling Rate: 16Bit/48Khz/64Kbps
Audio DAC Frequency Response Range: 20Hz-20KHz
Audio DAC Output Power: 4mW (only output audio signals, cannot directly drive the speaker, needs to be connected to a power amplifier to drive the speaker)
External dimensions: 22.8x15.1x3mm
Weight: 3g
Transmission Delay: 15-20ms (The delay between the input audio signal at the transmitting end and the output audio signal at the receiving end)
Communication Distance: 20-25 meters (open and unobstructed environment testing)
Transmission Mode: Receive
Transmission Module Description:
1> Button operation:
Short Press: Cyclic selection of noise reduction levels, Cycle between "Noise reduction shutdown"=>"Mild noise reduction"=>"Medium noise reduction"=>"Depth noise reduction", and The default setting for each startup is' Noise reduction shutdown '.
Long Press: Long press for 2 seconds to clear pairing memory and search for nearby receivers again. Once a receiver is found, it will automatically connect and memorize, and the next time it is powered on, it will automatically connect to the memorized device.
Double Click: Cycle between "Reverb on/Reverb off" each time you double click the button, The default setting for each startup is "Reverb off".
Notice:
About Noise Reduction: The noise reduction function can effectively remove ambient noise in noisy environments, such as wind noise, vehicle driving noise, and mixed human voices. Of course, it is not that the higher the noise reduction intensity, the better. The higher the intensity of noise reduction, the more your own voice will be lost, You can choose the noise reduction level based on the specific usage environment.
About Reverberation: The reverberation function can produce multiple gradually weakening echoes, It can beautify the human voice and is suitable for use in singing and speech environments.
2> Status indicator
The status indicator light is a red and blue dual color light, and the following are several status descriptions
Waiting for Connection (No connection): Flashing red and blue alternately (red light on for 500ms, blue light on for 500ms)
Connected: Blue light fast flashes twice within 5 seconds
3> The 0R resistor connected in series with microphone signal onboard
Removing this resistor disconnects the signal input from the onboard microphone to the chip. If you do not need to use the microphone onboard and use an external microphone or directly input the audio signal, you need to disconnect this resistor to cut off the signal from the onboard microphone.
4> Electret microphone on board
5> Input and output wiring pad
(1) MIC +: External microphone positive pole or audio signal cable
(2) MIC - : External microphone negative pole or audio signal cable GND
(3) GND: Power supply negative pole
(4) 3.3-5V: Power supply positive pole, input voltage range 3.3-5V
Receiver Module Description:
1> Status indicator
The status indicator light is a red and blue dual color light, and the following are several status descriptions
Waiting for Connection (No connection): Flashing red and blue alternately (red light on for 500ms, blue light on for 500ms)
Connected: Blue light fast flashes twice within 5 seconds
2> Button (This button is reserved, no function)
3> Input and output wiring pad
(1) LINK:Paired connection status output, high level 3V output when connected, low level 0V output when not connected.
(2) CON:Key-button interface cable (reserved, no function).
(3) OUTR:Right channel audio output (If the transmitter and receiver are paired to create a microphone, its purpose is mono, so both OUTL and OUTR signals are mixed and output, There is no need to distinguish between left and right channels).
(4) OUTL/MIC:Left channel audio output, microphone audio signal output (If the transmitter and receiver are paired to create a microphone, its purpose is mono, so both OUTL and OUTR signals are mixed and output, There is no need to distinguish between left and right channels).
(5) AGND: Audio GND. Audio signals refer to GND, and connecting to GND at the filter capacitor at the power supply end can reduce digital noise. (AGND must be connected to GND outside the module).
(6) GND: Power supply negative pole
(7) 3.3-5V: Power supply positive pole, input voltage range 3.3-5V
Wiring Reference Diagram:
Pairing and Unpairing Instructions:
Long press and hold the pairing button on the transmitting end for 2 seconds to unbind the current receiving module and search for a new receiving module. Once it is found, it will automatically connect and memorize the currently connected receiving module. Each time the transmitting module is powered on, it will search for the last connected receiving module. If it is not the paired receiving module in memory, it will not be connected.
Notice:
At present, a transmitting module can only be connected to one receiving module, and cannot be connected to multiple receiving modules simultaneously. Similarly, a receiving module can only be connected to one transmitting module.
This module has the function of binding and pairing at the transmitting end, while the receiving end does not have the function of binding and pairing. Once the transmitting end A is connected to the receiving end A, the transmitting end A can only connect to the first connected receiving end A, but the receiving end A can connect to other transmitting ends B.
Packing List:
1pcs x 2.4G Wireless Microphone Audio Module