KCX_EMITER Bluetooth 5.3 Stereo Audio Transmitter & Receiver Module

Upgrade your wireless audio projects with the KCX_EMITER Bluetooth 5.3 Audio Transmitter Module — a compact, high-performance GFSK transceiver board designed for DIY electronics enthusiasts, makers, and engineers. Whether you need to transmit audio to Bluetooth headphones or receive audio from a wireless source, this versatile stereo module handles both modes with ease.

Made in Mainland China.

Why Choose the KCX_EMITER BT 5.3 Module?

Bluetooth 5.3 Technology: Leverages the latest BT 5.3 protocol for faster, more stable wireless connections with auto-reconnect to previously paired devices — no manual re-pairing needed.
Dual-Mode Operation: Switchable between audio transmitter and audio receiver modes — perfect for streaming audio to BT speakers, headphones, earbuds, or other Bluetooth-enabled devices.
High-Fidelity Stereo Sound: With an audio SNR of 95dB, dynamic range of 80dB, and a full 20Hz–20KHz frequency response, you get crystal-clear, true stereo audio in both directions.
AT Command Support: Configure Bluetooth device name, connection management, and status indication via AT commands — ideal for seamless integration into custom firmware and DIY projects.
Ultra-Compact Form Factor: Measuring just 24 × 15 × 3mm, this tiny board fits into even the most space-constrained enclosures while including a status LED for quick connection feedback.
Wide Operating Voltage: Runs on 3.5–5V, making it compatible with Arduino, Raspberry Pi, and most common microcontroller platforms right out of the box.

Technical Specifications

Model: KCX_EMITER
Bluetooth Version: 5.3
Operating Voltage: 3.5–5V DC
Operating Current: 35mA
RF Output Power: +5dBm
RF Frequency Range: 2402–2480MHz
Transmission Distance: ≤ 20 meters (line of sight)
Audio Dynamic Range: 80dB
Total Harmonic Distortion: –70dB
Audio Frequency Response: 20Hz–20KHz
Signal-to-Noise Ratio: 95dB
Audio I/O Signal Amplitude: ≤ 2Vpp
Channels: 2-channel Stereo
Transmission Delay: 250–300ms
Board Dimensions: 24 × 15 × 3mm (0.94 × 0.59 × 0.12 in)

What's in the Box

1× KCX_EMITER Bluetooth 5.3 Transceiver Module
1× Antenna

Great For

DIY Bluetooth audio projects
Wireless speaker builds
Arduino / Raspberry Pi audio upgrades
Custom earphone & headphone mods
Prototyping and electronics development

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For more information on wireless communication standards, visit the NIST Wireless Technology Resource.

Note: Due to monitor and lighting variations, actual product color may differ slightly from images. Please allow ±1–2cm measurement tolerance.

Learn more: Module

Frequently Asked Questions

Q: Can the KCX_EMITER Bluetooth 5.3 module work as both a transmitter and a receiver?

A: Yes! The KCX_EMITER BT 5.3 audio module supports both transmitter and receiver modes. You can configure it via AT commands to either send audio wirelessly to Bluetooth speakers or headphones, or receive audio from a Bluetooth-enabled source device.

Q: What microcontrollers or platforms is this Bluetooth 5.3 audio module compatible with?

A: The module operates on 3.5–5V and communicates via standard AT commands, making it compatible with Arduino, Raspberry Pi, ESP32, and most other common microcontroller and development platforms used in DIY electronics projects.

Q: What is the wireless transmission range of the KCX_EMITER stereo GFSK transceiver?

A: The KCX_EMITER module supports a transmission distance of up to 20 meters in open line-of-sight conditions. Walls, interference, and obstructions may reduce the effective range in real-world environments.

Q: Does this module support automatic reconnection to paired Bluetooth devices?

A: Yes. The Bluetooth 5.3 protocol used by this module includes automatic reconnection to the last paired device, so you won't need to manually re-pair every time you power the module on.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

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