TOA Electronics WM-4220, WM-4210 User Manual







Please follow the instructions in this manual to obtain the optimum results from this unit. We also recommend that you keep this manual handy for future reference.


Be sure to read the instructions in this section carefully before use.

Make sure to observe the instructions in this manual as the conventions of safety symbols and messages regarded as very important precautions are included.

We also recommend you keep this instruction manual handy for future reference.

Safety Symbol and Message Conventions

Safety symbols and messages described below are used in this manual to prevent bodily injury and property damage which could result from mishandling. Before operating your product, read this manual first and understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards.



Indicates a potentially hazardous situation which, if mishandled, could result in death or serious personal injury.

Indicates a potentially hazardous situation which, if mishandled, could result in moderate or minor personal injury, and/or property damage.


To prevent the electromagnetic wave from badly influencing medical equipment, make sure to switch off the unit's power when placing it in close proximity to the medical equipment.


When the unit is not in use for 10 days or more, be sure to take the battery out of the unit because battery leakage may cause personal injury or contamination of environment.

Make sure to observe the following handling precautions so that a fire or personal injury does not result from leakage or explosion of the battery.

·Do not short, disassemble, heat nor put the battery into a fire.

·Never charge batteries of the type which are not rechargeable.

·Do not solder a battery directly.

·Be sure to use the specified type of battery.

·Note correct polarity (positive and negative orientation) when inserting a battery in the unit.

·Avoid locations exposed to the direct sunlight, high temperature and high humidity when storing batteries.


The WM-4210 Wireless Microphone employs a dynamic microphone element and is suitable for vocal applications.

The WM-4220 Wireless Microphone employs an electret condenser microphone element and is suitable for speech applications.


One frequency can be selected from 16 operating frequencies of 690 – 865 MHz.

An optimized PLL-synthesizer minimizes the oscillation frequency drift resulting from the ambient temperature or voltage fluctuation.

Battery lamp indicates battery consumption to prevent the unit from malfunctioning when the battery level remarkably decreases.


Do not expose the unit to rain or an environment where it may be splashed by water or other liquids, as doing so may result in unit failure.

Never open nor remove the unit case to modify the unit. Refer all servicing to your nearest TOA dealer.

Take care not to drop the unit onto the floor nor bump it against a hard object as the unit could fail.

Do not place the unit in locations of high temperature (ex. in a car parked in summer) or high humidity as the unit could fail.

Do not use the unit in locations where it is exposed to seawater.

To clean, use a dry cloth. When the unit gets very dirty, wipe lightly with a cloth damped in a dilute neutral cleanser, then wipe with a dry cloth. Never use benzine, thinner, or chemically-treated cleaning towel.

Avoid using a mobile telephone near the wireless microphone in use. Noise could be picked up.




Power/Battery lamp (Orange LED)

Power ON/OFF switch

Channel select switch

Battery clip

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