• Professional UHF Frequency (657-663 MHz): Operates in a dedicated band that doesn't compete with WiFi, Bluetooth, or wireless instruments — no dropouts when your venue fills up
• 150-Foot Working Range: Cover larger stages with room to spare — 67% more range than compact 2.4GHz systems
• Under 3ms Latency: Imperceptible delay — sounds and feels like you're plugged in direct
• 13 Available Channels: Run up to 13 simultaneous systems for full band monitoring, or pair multiple receivers to a single transmitter for shared mixes
• Visual AF Meters: Integrated on both transmitter and receiver for optimal gain staging — avoid clipping and dial in clean levels at a glance
• Factory-Paired Plug & Play: Power on both units and they sync automatically — no frequency coordination needed for single-system use
• Independent Volume Control: Receiver volume knob preserves your preferred level between power cycles
• Integrated Belt Clip: Secure receiver attachment built in — no accessories to buy or lose
• Hardshell Carrying Case Included: Professional protection for transport — not a cheap soft bag
• FCC Certified: Meets all federal requirements for UHF wireless transmission

• Wireless transmitter (XLR female input)
• Wireless receiver with integrated belt clip (3.5mm output)
• USB-C charging cable
• XLR male to 1/4" TS adapter
• Hardshell carrying case
• Quick start guide

Note: Works with any standard 3.5mm earphones or IEMs (not included)

📖 Table of Contents

• Quick Start Guide
• What's Included
• Controls and Features
• Locking/Unlocking Frequencies
• Charging
• Built-in Limiter
• Specifications
• FAQ

✅ Quick Start Guide

• Power on: Press and hold the power button for 2 seconds on both transmitter and receiver. Units will auto-sync and display solid wireless signal bars.
• Connect transmitter: Plug the transmitter into your audio source (mixing console, headphone amp, etc). Use included XLR→¼” adapter if needed.
• Connect receiver: Plug earphones into receiver’s 3.5mm output.
• Adjust wireless frequency (if needed): Double-click transmitter power button to cycle through frequencies. The receiver follows automatically if unlocked.
• Adjust audio source output: Set source output until transmitter AF meter shows ~75% without clipping.
• Adjust receiver volume: Use receiver volume knob. Start low and increase gradually.
• Units are factory-paired. Frequency locking is only required when using multiple systems.

📦 What's Included

• Wireless transmitter
• Wireless receiver with belt clip
• USB-C charging cable
• XLR male to ¼" TS adapter
• Hardshell carrying case

🎛️ Controls and Features

Transmitter

• XLR Input: Connect line-level audio source (mixer send, aux output, etc.)
• Power Button: Hold 2s to power on/off; double-click to change frequency
• LCD Display: Shows frequency, battery, AF meter, signal strength
• USB-C Port: Charges 950mAh battery (5V/1A)

Receiver

• 3.5mm Output: Connect any standard earphones or IEMs
• Volume Knob: Clockwise to increase, counterclockwise to decrease
• Power Button: Hold 2s to power on/off; press three times to engage or disengage the built-in limiter
• LCD Display: Shows frequency, battery, AF meter, signal strength
• Belt Clip: Integrated for secure attachment
• USB-C Port: Charges 950mAh battery (5V/1A)

🔒 Locking/Unlocking Frequencies

How Automatic Frequency Matching Works

By default, AirSync IEM receivers automatically sync to the nearest transmitter when powered on. This allows simple plug-and-play operation for single-system use.

When to Use Frequency Locking

• Using multiple AirSync IEM systems simultaneously
• Performing near other AirSync users
• Ensuring receivers only connect to specific transmitters

Once locked, receivers will only connect to their paired transmitter.

System Capabilities: Up to 13 transmitters on different channels. Multiple receivers can lock to one transmitter.

Lock Process

1. Setup: Turn off all other AirSync devices before starting.
2. Step 1: Hold transmitter power until screen blanks and flashes, then press once. Display shows “LOCK”.
3. Step 2: Within 10 seconds, hold receiver power until screen shows “LOCK”. Repeat for each receiver.
4. Step 3: While all screens flash “LOCK”, press transmitter power once to confirm.
5. Success: All units return to normal and display same channel.

Unlock Process

1. Step 1: Hold transmitter power until display flashes, then press twice. Display shows “UNLOCK”.
2. Step 2: Within 10 seconds, hold receiver power until “UNLOCK” appears. Repeat for each receiver.
3. Step 3: While flashing, press transmitter once to confirm unlock.
4. Success: Receivers now auto-sync to any available transmitter.

📌 Quick Reference

Lock when using multiple systems to keep each receiver tied to its transmitter. Unlock to allow auto-sync to any transmitter.

Common Locking Mistakes

• ❌ Don’t power receivers before transmitter shows “LOCK/UNLOCK”
  ✅ Wait for flashing before syncing receivers
• ❌ Don’t delay between receivers (10s timeout)
  ✅ Work quickly through all receivers
• ❌ Don’t forget the final transmitter press
  ✅ Always confirm to complete process

🔋 Charging

• Battery: 3.7V 950mAh Li-ion
• Battery Life: 5–6 hours (varies by use)
• Charge Time: 2–3 hours via USB-C (5V/1A)
• Low Battery Warning: Appears with ~1 hour remaining
• Both units can charge simultaneously and operate while charging.

🛡️ Built-in Limiter

⚙️ Specifications

Specification	Value
Frequency Band	657–663 MHz
Channels	13
Latency	<3 ms
Frequency Response	20Hz–20kHz
Working Range	Up to 150 ft
Battery Life	5–6 hours
Transmitter Power	3–8 mW
SNR	>95 dB
Transmitter Input	XLR female (line level)
Receiver Output	3.5mm TRS stereo
Simultaneous Systems	Up to 13 transmitters
Receivers per Transmitter	Multiple

Frequently Asked Questions

Shipping

• Free standard shipping on all US orders
• Orders placed before 2 PM PST ship same day
• Most US customers receive their order within 2-3 business days
• Tracking provided within 24 hours of shipment

Returns & Guarantee

• 60-day money-back guarantee - no questions asked
• Try it at rehearsals, gigs, and different venues
• If it doesn't outperform your current monitoring setup, send it back for a full refund