LOMEHO LO-U11H2 UHF Wireless Lavalier Microphone System

Introduction

Thank you for choosing the LOMEHO LO-U11H2 UHF Wireless Lavalier Microphone System. This manual provides detailed instructions for the proper setup, operation, and maintenance of your new microphone system. Please read it carefully before use to ensure optimal performance and longevity of the product.

Product Features

• UHF Multi-Frequency: Offers 2*450 channels across frequency ranges A: 500.00-544.90MHz and B: 550.00-594.90MHz.
• Anti-feedback Function: Multi-level anti-howling capability.
• IR SYNC: Infrared synchronization for easy frequency matching between transmitter and receiver.
• Mute Function: Temporarily disables audio transmission from the transmitter.
• Frequency Lock: Prevents accidental frequency changes.
• Battery Power Display: Screens on both receiver and transmitters show current battery levels.
• Extended Working Range: Operates effectively over 50 meters (164 feet) in obstacle-free environments.
• Digital PLL Technology: Second-generation digital Phase-Locked Loop technology for stable performance.
• Broadband Automatic Selection: Automatically selects available frequencies.
• USB 5V Input Power Supply: Receiver supports USB 5V power input for versatile power options.
• Suitable for various applications: Ideal for church, school, party, meeting, and stage performances.

Package Contents

Please check the package to ensure all items are present:

• 1 x Receiver Unit
• 2 x Detachable Antennas
• 1 x 6.3mm Audio Cable
• 2 x Bodypack Transmitters
• 2 x Headset Microphones
• 2 x Lavalier Microphones
• 1 x Power Adapter (5V1A)
• 1 x Power Cable (USB Type-C)
• 1 x User Manual (this document)

Component Overview

Receiver Unit

Receiver Front Panel Controls

1. 1/5: UP/Down Button: Press to select frequency.
2. 2/4: SET Button: Infrared data transmission launch button. Long press for ~10 seconds to lock/unlock other buttons.
3. 3: Screen: LCD display for status information.
4. 6/8: Volume Knob: Adjusts the output volume for each channel.
5. 7: IR Signal Indicator: Flashes red during frequency syncing, solid when synced.
6. 9: Anti-feedback Indicators: Shows the level of anti-feedback applied.
7. 10: Power Switch: Turns the receiver ON/OFF.
8. 11: Anti-feedback Button: Activates/deactivates the anti-feedback function.

Receiver Rear Panel Connections

1. 1/6: Antenna Connectors: For connecting the detachable antennas.
2. 2: XLR Balance Audio Output Sockets (BALANCED-1, BALANCED-2): For balanced audio output to professional audio equipment.
3. 3: USB 5V Power Supply (Type-C): For connecting a 5V USB power source or power bank.
4. 4: DC Power Supply (12V): For connecting the included power adapter.
5. 5: Unbalanced Mixing Audio Output Socket (MIX OUT): For unbalanced audio output to consumer audio equipment.

Receiver LCD Display Indicators

1. 1/6: Radio Frequency (RF) Signal Level: Indicates the strength of the received RF signal. Lights up when the transmitter is ON.
2. 2/5: Squelch Locked Indicator: Appears when the squelch function is active.
3. 3/4: Frequency Indicator: Displays the current operating frequency.
4. 7/14: Audio Frequency (AF) Signal Level: Indicates the strength of the audio signal. Lights up when the transmitter picks up sound.
5. 8/13: Antenna A or B Indicator: Shows which antenna is currently active.
6. 9/12: Transmitter Power Level Indicator: Displays the battery level of the connected transmitter.
7. 10/11: Transmitter Channel Indicator: Shows the current channel number of the transmitter.

Bodypack Transmitter

• Mic Input & Volume Knob: 3.5mm input for lavalier or headset microphones, with an adjacent volume control.
• Screen: LCD display showing frequency, channel, and battery status.
• Battery Compartment: Holds two AA batteries.
• Antenna: Integrated antenna for signal transmission.
• IR Window: For infrared synchronization with the receiver.
• Power Button: Turns the transmitter ON/OFF.
• UP/DOWN Buttons: For adjusting frequency.
• SET Button: For confirming frequency changes and initiating IR SYNC.

Setup Instructions

1. Receiver Connection

1. Connect Antennas: Screw the two detachable antennas onto the ANT-1 and ANT-2 connectors on the receiver's rear panel. Ensure they are standing freely for optimal signal reception.
2. Power Supply: Connect the included power adapter to the DC Power Supply (12V) input on the receiver. Alternatively, you can use a 5V USB power bank connected to the USB 5V Power Supply (Type-C) input.



3. Audio Output: Connect the receiver to your audio mixer, amplifier, or sound system using either the XLR Balanced Audio Output Sockets (BALANCED-1, BALANCED-2) for professional connections or the Unbalanced Mixing Audio Output Socket (MIX OUT) for standard connections.
4. Power On: Press the Power Switch on the receiver's front panel to turn it on.

2. Bodypack Transmitter Setup

1. Battery Installation: Open the battery compartment on the bodypack transmitter and insert two AA batteries, ensuring correct polarity.



2. Microphone Connection: Plug your chosen lavalier or headset microphone into the 3.5mm Mic Input socket on the bodypack transmitter.
3. Power On: Press the Power Button on the bodypack transmitter to turn it on. The display will light up.

3. Frequency Synchronization (IR SYNC)

Under normal circumstances, the system is pre-configured and ready to use out of the box. If you need to change frequencies or re-sync, follow these steps:

1. Select Frequency: On the receiver, use the UP/DOWN buttons to select your desired frequency.
2. Prepare Transmitter: Turn on the bodypack transmitter.
3. Align IR Ports: Position the IR emission window of the bodypack transmitter approximately 10-20 cm (4-8 inches) from the IR signal light on the receiver.



4. Initiate SYNC: Press the SET button on the receiver. The receiver's RF signal light will flash, indicating it's searching for the transmitter.
5. Confirm SYNC: Once synchronized, the receiver's RF signal light will stop flashing and remain solid, and the transmitter's frequency will match the receiver's. This indicates a successful connection.

Note:

• If synchronization fails, repeat the steps.
• When synchronizing multiple transmitters, ensure only one transmitter's IR port is exposed to the receiver at a time to prevent them from pairing to the same frequency, which can shorten the microphone's effective use distance.

Operation

Adjusting Frequency

To change the operating frequency, use the UP/DOWN buttons on the receiver to select a new frequency, then perform the IR SYNC process as described above.

Anti-feedback Function

The system features a multi-level anti-feedback function to prevent howling. You can activate this function by pressing the Anti-feedback button on the receiver's front panel. Be aware that activating this function may slightly affect the sound quality.

Mute Function

To mute the bodypack transmitter, briefly press the ON/OFF button (do not long press). The transmitter's screen will display "AF OFF", indicating that the receiver will no longer receive audio signals from that transmitter. To unmute, briefly press the ON/OFF button again.

Locking/Unlocking Frequency

To prevent accidental frequency changes, you can lock the frequency on the receiver:

1. Lock: Long press the SET button on the receiver for approximately 10 seconds. A "key" icon will appear on the screen, indicating the frequency is locked.
2. Unlock: To change the frequency, you must first unlock it. Long press the SET button for another 10 seconds until the "key" icon disappears.

Battery Monitoring

Both the receiver and bodypack transmitters feature battery level indicators on their LCD screens. Regularly check these indicators. If the battery power is low, replace the batteries in the transmitters promptly. Low battery power can negatively impact the working range and sound quality.

Working Range

The system has an effective working range of over 50 meters (164 feet) in environments free from obstacles and significant interference. Performance may vary depending on environmental conditions.

Specifications

Maintenance

• Cleaning: Use a soft, dry cloth to clean the surfaces of the receiver and transmitters. Do not use liquid cleaners or solvents.
• Storage: When not in use for extended periods, remove batteries from the transmitters to prevent leakage. Store the system in a cool, dry place away from direct sunlight and extreme temperatures.
• Antennas: Handle antennas carefully to avoid bending or breaking.
• Battery Replacement: Always replace batteries with new ones of the correct type (AA) and ensure proper polarity.

Troubleshooting

• No Sound Output:
  • Ensure both receiver and transmitters are powered on.
  • Check battery levels in transmitters and replace if low.
  • Verify that the receiver is correctly connected to your audio system.
  • Confirm that the transmitter and receiver are successfully synchronized (RF light on receiver is solid).
  • Check if the transmitter's mute function is active ("AF OFF" on transmitter screen).
  • Adjust volume knobs on both the transmitter and receiver.
• Interference/Poor Sound Quality:
  • Change the operating frequency on the receiver and re-sync the transmitter.
  • Ensure there are no obstacles between the transmitter and receiver.
  • Keep the system away from other wireless devices or strong electromagnetic fields.
  • Check battery levels; low batteries can affect performance.
• Failure to SYNC:
  • Ensure the transmitter's IR window is properly aligned with the receiver's IR light, within 10-20 cm.
  • Repeat the SYNC process carefully.
  • If using multiple transmitters, ensure only one is exposed to the receiver's IR port during synchronization.
• Frequency Locked: If you cannot change the frequency, check if the "key" icon is displayed on the receiver's screen. Long press the SET button for 10 seconds to unlock it.

User Tips

• For best audio quality, position the lavalier microphone approximately 6-8 inches from the speaker's mouth.
• Always perform a sound check before any important event to ensure stable connection and optimal audio levels.
• When using the anti-feedback function, experiment with its activation to find the balance between feedback suppression and desired sound quality.
• Keep spare AA batteries on hand for the bodypack transmitters, especially during long events.
• Ensure the receiver's antennas are fully extended and positioned vertically for the best signal reception.

Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the seller's contact information or the official LOMEHO website. Keep your purchase receipt as proof of purchase.

This manual is subject to change without prior notice. The latest version can be found on the manufacturer's website.