KCX BT003 Bluetooth 4.2 Audio Receiver Module

Description

The KCX BT003 is a compact, affordable Bluetooth 4.2 stereo audio receiver board designed to add wireless functionality to wired audio systems. Whether you’re upgrading speakers, car stereos, TVs, or building DIY gadgets, this module provides high-quality music playback and hands-free calling. It also serves as a USB sound card, MP3 player via USB or TF card, plus features intuitive control buttons and voice prompts.

Key Features:-

Bluetooth 4.2 audio & calling: Seamless A2DP music streaming, HFP/HSP voice-calling with dial‑answer/hang-up/last-call redial support. FTC٩ USB & TF playback priority (USB sound → USB mass storage → TF).

Physical controls: Built-in buttons for volume ±, previous/next track (short/long press), play/pause, and mode switching. Call control via play/pause button (answer/reject/hang-up/redial).

convenient to use: Wireless bluetooth transmission is convenient to use, compact in size and lightweight.

KCX BT003 Bluetooth 4.2 Audio Receiver Module

LED & voice indicators: Clear LED pairing/status signals and optional English voice prompts.

Compact design: Board measures around 23 × 15 × 2 mm, weighing under 2 g—simple to integrate into tight spaces

Specifications:-

Bluetooth version 4.2 (backward compatible) Working frequency 2 400–2 485 MHz

RF output power ~2 dB  Receiving sensitivity –85 dBm  Dynamic range 91 dB

Total harmonic distortion –70 dB  Crosstalk –86 dB  Signal-to-noise ratio (SNR) 90 dB

Current consumption 30–50 mA (varies by vendor)  Supply voltage 3.3–5 V DC

Physical size approx. 23 × 15 × 2 mm  Weight ~0.8–2 g

Applications & Use Cases

Build DIY Bluetooth gadgets: headphones, intercoms, smart home systems.

Add Bluetooth playback to wired audio devices or restore older electronics.