1. Introduction
The SOOMFON BT32 is a versatile 3-in-1 Bluetooth 5.3 audio adapter designed to enhance your audio experience. It functions as a Bluetooth transmitter (TX), a Bluetooth receiver (RX), and supports a bypass mode for direct wired connections. Featuring a dual-antenna design and an LCD display, it ensures stable signal transmission, wide compatibility, and user-friendly operation.

Figure 1: SOOMFON BT32 Bluetooth 5.3 Transmitter Receiver
Key Features:
- Dual Antenna Design: Ensures stronger signal stability and faster data transmission with Bluetooth 5.3.
- 3-in-1 Functionality: Supports Transmitter (TX), Receiver (RX), and Bypass modes.
- Dual Connection: Connects to two headphones or speakers simultaneously in TX mode.
- LCD Display: Provides real-time updates on device operation and pairing status.
- Wide Compatibility: Supports optical fiber, AUX, and RCA audio input/output for various non-Bluetooth devices.
Video 1: Overview of the SOOMFON 3-in-1 Bluetooth Transmitter Receiver.
2. What's in the Box
Verify that all items are included in your package:
- Bluetooth Audio Adapter x1
- USB-C Power Cable x1
- Optical Cable x1
- 3.5mm AUX to RCA Cable x1
- 3.5mm Audio Cable x1
- Velcro x1
- User Manual x1

Figure 2: Package Contents
3. Setup Guide
3.1. Powering On
Connect the provided USB-C power cable to the DC IN port on the BT32 adapter and plug the other end into a USB power source (e.g., TV USB port, USB wall adapter).
3.2. Transmitter Mode (TX) Setup
In TX mode, the BT32 transmits audio from your non-Bluetooth device (like a TV or PC) to Bluetooth headphones or speakers.
- Connect your audio source (e.g., TV, PC) to the BT32's input port (Optical, AUX, or RCA) using the appropriate cable.
- Ensure the BT32 is in TX mode (indicated on the LCD display). If not, press the mode button to switch.
- Place your Bluetooth headphones or speakers into pairing mode.
- The BT32 will automatically search for nearby Bluetooth devices. Select your device from the list on the LCD and confirm pairing.
- For dual connection, repeat steps 3 and 4 for a second pair of headphones/speakers.

Figure 3: Transmitter Mode (TX) Connection
Video 2: Demonstrates setting up the SOOMFON BT32 in Transmitter Mode.
3.3. Receiver Mode (RX) Setup
In RX mode, the BT32 receives audio from your Bluetooth-enabled device (like a phone or tablet) and plays it through wired speakers or a HiFi system.
- Connect your wired speakers or audio system to the BT32's output port (AUX or RCA) using the appropriate cable.
- Ensure the BT32 is in RX mode (indicated on the LCD display). If not, press the mode button to switch.
- Turn on Bluetooth on your phone or tablet and search for