The Audio-Technica ATW-3211/831EE1 is a fourth-generation 3000 Series wireless lavalier microphone system designed for professional presentations, lectures, houses of worship, theaters, business environments, educational facilities, and live performance. The system combines a rackmountable true-diversity receiver, a bodypack transmitter, and an AT831cH cardioid lavalier microphone to provide clear, natural speech reproduction and flexible wireless operation. Its UHF tuning system offers a wide tuning range and 2,400 selectable frequencies for finding suitable channels in increasingly congested RF environments.

The included AT831cH cardioid lavalier microphone is designed for hands-free speech and instrument applications. Its directional pickup pattern helps reject unwanted background sound and reduce feedback compared with an omnidirectional microphone. The bodypack transmitter features a secure four-pin cH-style screw-down connector, adjustable input gain from -10 to +20 dB, a physical mute switch, and selectable 10 mW or 30 mW RF output power.

The ATW-R3210 receiver features true-diversity reception, automatic frequency scanning, removable BNC antennas, and a dual-mode OLED display showing operating frequency, RF signal strength, audio level, transmitter information, battery status, and mute status. Its rugged metal half-rack chassis supports portable rack cases and permanent installations, with included mounting hardware for rack installation.

Key Features

• Professional 3000 Series fourth-generation analog UHF wireless microphone system.
• Includes ATW-R3210 receiver, bodypack transmitter, and AT831cH cardioid lavalier microphone.
• True-diversity reception helps minimize signal dropouts.
• Wide 60 MHz tuning bandwidth with 2,400 selectable frequencies.
• Automatic frequency scanning for interference-aware channel selection.
• Selectable 10 mW or 30 mW RF output power.
• Up to 100 m (328 ft) typical operating range in open environments.
• Up to 40 compatible channels per frequency band, subject to regional conditions.
• Half-rack receiver with dual-mode OLED display and removable antennas.
• Up to 9.5 hours of operation with compatible rechargeable NiMH batteries.

Ideal For

• Corporate presentations and conferences.
• Lectures and educational facilities.
• Houses of worship.
• Theater productions and live performances.
• Public speaking and professional presentations.
• Instrument microphone applications.
• Portable production racks and permanent audio installations.

What's in the Box

• 1 × Audio-Technica ATW-R3210 receiver.
• 1 × Audio-Technica ATW-T3201 bodypack transmitter.
• 1 × Audio-Technica AT831cH cardioid lavalier microphone.
• 2 × Flexible UHF receiver antennas.
• 1 × AC power adapter, subject to regional configuration.
• 1 × Rackmount adapter/hardware set.
• 2 × AA batteries required for the bodypack transmitter are not included.

Inputs & Outputs

• Receiver Balanced Output 3-pin XLR output, maximum level +14 dBV.
• Receiver Unbalanced Output 1/4-inch (6.3 mm) output, maximum level +8 dBV.
• Receiver Antenna Inputs Two BNC-type, 50-ohm antenna connections.
• Antenna Power 12 V DC, 160 mA combined for compatible active antennas or RF devices.
• Bodypack Input Four-pin cH-style screw-down connector.
• Input Pin 1 Ground.
• Input Pin 2 Instrument input.
• Input Pin 3 Microphone input.
• Input Pin 4 +5 V DC bias.
• Microphone Connector Four-pin cH-style connector.
• Transmitter Controls Mute switch, adjustable input gain, and multifunction button.
• Synchronization Infrared sync between receiver and transmitter.

Frequently Asked Questions

What microphone is included with the ATW-3211/831EE1?

The system includes the AT831cH cardioid lavalier microphone, designed for hands-free speech and suitable instrument applications.

What is the maximum operating range?

The specified typical range is up to 100 m (328 ft) in an open environment without interfering signals. Actual performance depends on placement, obstacles, interference, and local RF conditions.

How many channels can operate simultaneously?

The manufacturer specifies up to 40 channels per band, subject to the frequency band, region, and frequency coordination requirements.

Can the receiver be installed in a rack?

Yes. The receiver uses a half-rack chassis and includes rackmount hardware for installation in a compatible 19-inch rack.

Can the system operate in every listed frequency band worldwide?

No. Frequency availability and permitted RF power vary by country and region. Confirm that the EE1 band is legal and supported in your location before use.

Full Technical Specifications

General Specifications

Product Model	ATW-3211/831EE1
Series	Audio-Technica 3000 Series, 4th Generation
Wireless Technology	Analog UHF
Frequency Band	EE1
EE1 Frequency Range	530.000–589.975 MHz, according to the supplied manufacturer frequency table
Number of Selectable Frequencies	2,400
Minimum Frequency Step	25 kHz
Modulation	FM
Typical Operating Range	100 m (328 ft), open environment
Diversity	True diversity
Dynamic Range	115 dB, microphone input; 112 dB, instrument input
Total Harmonic Distortion	Less than 1.0% at 1 kHz, ±17.5 kHz deviation
Operating Temperature	23°F–113°F (-5°C–45°C)
Frequency Coordination	Automatic frequency scan and pre-coordinated frequency scan groups

Receiver Specifications

Receiver Model	ATW-R3210
Receiver Type	Tabletop / rackmountable
Receiving System	True diversity
Antennas	2 removable external BNC antennas
Image Rejection	60 dB nominal
RF Sensitivity	20 dBµV at 60 dBA S/N ratio, 50-ohm termination
Audio Channels	1
Balanced Output	XLR, +14 dBV maximum
Unbalanced Output	1/4-inch (6.3 mm), +8 dBV maximum
Antenna Input Impedance	50 ohms
Antenna Power	12 V DC, 160 mA combined
Display	Dual-mode OLED
Frequency Scanning	Automatic
Receiver Controls	Control dial, Back button, settings lock
Ground Lift	Yes
Power Supply	100–240 V AC, 50/60 Hz to 12 V DC, 1 A
Adapter Polarity	Center-positive

Bodypack Transmitter Specifications

Transmitter Model	ATW-T3201
Transmitter Type	Bodypack
RF Output Power	10 mW / 30 mW, switchable
RF Output Impedance	50 ohms
Antenna	Removable flexible whip
Input Compatibility	Microphone, line, and instrument
Input Connector	Four-pin cH-style screw-down connector
Input Gain Range	-10 to +20 dB
Gain Adjustment Steps	2 dB
Bias Voltage	+5 V DC
Phantom Power	Not supported
Muting	Physical mute switch, defeatable as configured
Synchronization	Infrared
Display	Single-LED indicators
Battery Type	2 × AA, 1.5 V
Battery Life, Alkaline	Up to 8 hours at high power; up to 9 hours at low power
Battery Life, 1900 mAh NiMH	Up to 9 hours at high power; up to 9.5 hours at low power
Low-Frequency Roll-Off	125 Hz, 12 dB/octave

Lavalier Microphone Specifications

Included Microphone	Audio-Technica AT831cH
Microphone Type	Lavalier
Polar Pattern	Cardioid
Application	Speech and instrument pickup
Connector	Four-pin cH-style Hirose connector
Cable Length	Approximately 5 ft (1.4 m)
Color	Black
Phantom Power	Not supported through the bodypack input; +5 V DC bias is provided

Physical Specifications

Receiver Dimensions (W × D × H)	8.27 × 7.52 × 1.71 inches
Receiver Weight	2.425 lbs, without accessories
Bodypack Dimensions (W × D × H)	2.52 × 3.22 × 0.91 inches
Bodypack Weight	3.6 oz, without batteries
Package Weight	5.4 lbs
Box Dimensions (L × W × H)	15.5 × 13.6 × 3.5 inches