1. Introduction
This manual provides detailed instructions for the YMOO 2.4GHz Wireless Audio Transmitter and Receiver kit. This system is designed to transmit audio wirelessly from various sources such as TVs, PCs, MP4 players, and more, to audio output devices like powered speakers, amplifiers, or home theater systems. It operates on a 2.4GHz frequency, offering stable and low-latency audio transmission.
2. Package Contents
Please verify that all items listed below are included in your package:
- 1 x YMOO 2.4GHz Wireless Audio Transmitter
- 1 x YMOO 2.4GHz Wireless Audio Receiver
- 2 x Power Adapters (DC 5V)
- 2 x USB Power Cables
- 2 x 3.5mm to RCA Audio Cables
- 1 x User Manual (this document)

Image: The package includes one transmitter, one receiver, two power adapters, two USB power cables, two 3.5mm to RCA audio cables, and a user manual.
3. Product Overview
3.1. Transmitter and Receiver Units
The YMOO wireless audio system consists of two main units: a Transmitter (TX) and a Receiver (RX). Both units feature a multi-functional knob and various audio input/output ports.

Image: The YMOO wireless audio transmitter and receiver units, showing their top and front panels with controls and ports.
3.2. Ports and Controls
Each unit is equipped with the following:
- Multi-functional Knob: Located on the top surface, this knob controls power, mute/unmute, and volume.
- 3.5mm AUX Input/Output: For connecting devices with a 3.5mm audio jack.
- RCA Input/Output: For connecting devices with RCA audio cables (red and white).
- DC 5V IN Port: For power connection using the provided USB power cable and adapter.
- LED Indicator Ring: A blue ring light around the knob indicates the unit's working state (solid blue for paired, flashing blue for pairing, red for muted).

Image: The multi-functional knob allows for Power ON/OFF (press and hold for 1/3 seconds), Mute/Exit Mute (single press), and Volume Control (rotate right for increase, left for decrease).
4. Setup Instructions
Follow these steps to set up your YMOO Wireless Audio Transmitter and Receiver kit:
- Connect the Transmitter (TX):
- Connect the Transmitter to your audio source (e.g., TV, PC, CD player, MP4) using either the 3.5mm AUX input or the RCA inputs.
- Connect the Transmitter to a power source using the provided USB power cable and DC 5V power adapter. The unit will automatically power on.
- Connect the Receiver (RX):
- Connect the Receiver to your audio output device (e.g., powered speaker, amplifier, home theater system) using either the 3.5mm AUX output or the RCA outputs.
- Connect the Receiver to a power source using the provided USB power cable and DC 5V power adapter. The unit will automatically power on.
- Automatic Pairing:
- Once both the Transmitter and Receiver are powered on, they will automatically enter pairing mode and attempt to connect with each other.
- The LED indicator ring on both units will flash blue during pairing. Once successfully paired, the LED indicator ring will turn solid blue.
- The system is designed for plug-and-play operation, requiring no manual pairing steps after initial power-up.

Image: Step-by-step connection guide for the YMOO wireless audio system, illustrating connecting the transmitter to a TV, the receiver to speakers, and the automatic pairing process.
Note:
- The transmitter and receiver can only be connected to each other and cannot be paired with other Bluetooth devices.
- Simultaneous use of dual AUX and RCA inputs on the same unit is not recommended, as it may result in mixed audio at the receiving end.
5. Operating Instructions
5.1. Power On/Off
Press and hold the multi-functional knob for 1 to 3 seconds to power the unit ON or OFF.
5.2. Volume Control
Rotate the multi-functional knob clockwise to increase the volume and counter-clockwise to decrease the volume. The volume can be adjusted on either the transmitter or receiver unit.
5.3. Mute/Unmute
Press the multi-functional knob once to mute the audio. Press it again to unmute. When muted, the LED indicator ring will turn red.
5.4. Audio Transmission
The system provides 2.4GHz wireless audio transmission with less than 25ms latency, ensuring stable audio and video synchronization. The transmission range can reach up to 200 feet (60 meters) in open areas and a minimum of 98 feet (30 meters) indoors, depending on obstacles.

Image: A diagram showing the YMOO wireless audio system transmitting audio across different rooms in a house, highlighting its 200ft/60m long-distance capability.
6. Troubleshooting
- No Audio Output:
- Ensure both the transmitter and receiver are powered on and the LED indicator rings are solid blue, indicating a successful connection.
- Check all audio cables are securely connected to the correct input/output ports on both the YMOO units and your audio devices.
- Verify that the volume on both the YMOO units and your audio source/output device is not muted and is set to an audible level.
- Confirm that the audio source is playing content.
- Intermittent Audio or Disconnections:
- Ensure the transmitter and receiver are within the effective operating range (up to 200ft/60m in open areas, 98ft/30m indoors).
- Minimize physical obstructions (walls, large furniture) between the transmitter and receiver.
- Avoid placing the units near other 2.4GHz wireless devices (Wi-Fi routers, cordless phones) that may cause interference.
- Power cycle both units by disconnecting and reconnecting their power cables.
- Poor Audio Quality (Noise, Distortion):
- Check the quality of the audio source.
- Ensure that only one input type (AUX or RCA) is used at a time on each unit to prevent audio mixing.
- Reduce the distance between the transmitter and receiver.
- Units Not Pairing:
- Ensure both units are powered on and the LED indicator rings are flashing blue.
- If they do not pair automatically, power cycle both units.
- Confirm that you are not attempting to pair with a Bluetooth device, as these units only pair with each other.
7. Specifications
| Brand | YMOO |
| Model Number | B07Set |
| Wireless Technology | 2.4GHz |
| Latency | Less than 25ms |
| Transmission Range | Up to 200ft (60m) in open areas, minimum 98ft (30m) indoors |
| Audio Inputs/Outputs | 3.5mm Auxiliary, RCA |
| Power Input | DC 5V |
| Color | Black |
| Item Weight | 12 ounces (approx. 340g) |
| Package Dimensions | 6.89 x 5.63 x 1.85 inches (approx. 17.5 x 14.3 x 4.7 cm) |

Image: The dimensions of the YMOO transmitter and receiver units are approximately 2.34 inches (height) x 2.11 inches (width) x 1.35 inches (depth).
8. Warranty and Support
For warranty information and technical support, please refer to the contact details provided with your purchase or visit the official YMOO website. Keep your purchase receipt for warranty claims.





