Description

 

KCX_2.4G002 2.4G High Fidelity Audio Wireless Transmitter and Receiver with Built-in Battery Support One TX with Multiple RX

Description:
High fidelity wireless stereo audio transceiver is a wireless audio transceiver that integrates wireless stereo audio transmission and reception.

The stereo audio signal input from the 3.5mm stereo audio port at the transmitter end is first sampled and encoded by 24Bit stereo audio ADC at a 48KHz sampling rate, and then transmitted to space in the form of digital signal through the ISM band radio signal with a carrier of 2.402-2.480GHz.

After receiving the signal, the receiver first checks and decodes the digital signal, and then outputs it to the 24Bit audio DAC at the same 48KHz rate to form a sound analog audio signal and output it to the 3.5mm stereo audio port.

In order to ensure the stability of wireless transmission, the machine adopts an adaptive frequency hopping algorithm communication mechanism. When the current channel is found to be congested, it can automatically avoid the congested channel and switch to a relatively free channel to continue communication. This process is automatic and requires no human intervention.

Of course, due to the limited channel resources in the 2.4G band and the fact that Bluetooth and WIFI also occupy the 2.4G channel, it is not recommended that too many transmitters transmit simultaneously in the same space. It is recommended that no more than 10 transmitters transmit simultaneously in the same coverage area to avoid channel congestion and reduce the stability of communication.

In order to solve the problem that multiple transmitters in the same signal coverage area transmit signals at the same time and different receivers receive the specified transmitter signals without confusion, the machine uses 8-bit address coding for differentiation. Only when the receiver address coding settings are consistent with the transmitter settings can the connection be made, otherwise the connection will not be made.

This machine adopts private 2.4G wireless communication protocol and encoding and decoding algorithm, adopts broadcast transmission mode, and supports one sending and multiple receiving (within the signal coverage range of the transmitter, it supports an unlimited number of receivers to receive synchronously).

In order to be suitable for more applications, the built-in battery version and the battery free version of the phone can be selected. The built-in battery version can support charging with Type-C charging interface (compatible with the common Android phone Type-C charging interface and the phone's 5V charger). The battery life is 12 hours. For the version without built-in battery, an external 5V power supply is required to be input to the Type-c interface of the machine for power supply.

This machine is widely used in applications requiring wireless audio transmission, DIY wireless speaker modification, etc.

Specification:
- Model: KCX_2.4G002
- Size: 65 x 47mm
- Weight: 70g (built-in battery version)
- Working voltage: 3.5 - 5V
- Working current: 30 - 40mA
- Signal coverage radius: ≤50m
- RF output power: +8dBm
- RF frequency range: 2402 - 2480MHz
- Audio dynamic range: 104dB
- Audio total harmonic distortion and noise: -70dB
- Audio frequency response: 20Hz - 20KHz
- Sampling rate: 24Bit/48KHz
- Audio SNR: 95dB
- Audio input and output signal amplitude: ≤2Vpp
- Channel: 2 channel (Stereo)
- Transmission delay: 100mS

Package Included:
- 1 x Host
- 1 x 3.5mm Male to Male Audio Cable (Length: 80cm)
- 1 x Type-C Cable (Length: 1m)

1: D1-D8: 8-bit address code. Dial up to 0 and down to 1. There are 256 combinations. The receiver must dial the same address code as the transmitter to connect.

2: TX/RX: transmit/receive mode setting, the machine works in transmit mode when the switch is turned up, and the machine works in receive mode when the switch is turned down.

3: When the 3.5mm audio input/output interface is set to transmit mode, it is used to input audio signals from mobile phones, computers, MP3 players and other lines. When it is set to the reception mode, the audio signal can be output directly into the earphone or output to the audio amplifier to push the speaker.

4: Type-C charging/power supply interface:
Built in battery version: As a charging interface, it is compatible with common Android phone charging interfaces. The charger can use a 5V mobile phone charger.
Without built-in battery version: 5V power adapter or mobile phone charger that is used as a 5V power supply port and plugged into USB interface through USB cable.
Note: The charger and power adapter are not included.

5: Charging/power indicator light (blue):
Built in battery version: as the charging indicator light, the light will be on when charging, off when fully charged, and about 4 hours for fully charging.
Without built-in battery version: as the power indicator, the light will be on when power plug in, and the light is off without power in.

6: Status indicator (red and green):
Transmitting mode: flicker at the frequency of 3 seconds off ->flash twice.
Receiving mode: After the transmitter is successfully connected, it flashes synchronously with the transmitter LED at the frequency of 3 seconds off -> flash twice. If there is no connection, flash for 0.5 seconds on -> 0.5 seconds off.
Note: When this light is red, it indicates that the battery is low and needs to be charged, or the power supply voltage is too low.

7: 2.4G external antenna
8: Power Switch (press for 2 seconds)