X21A3E3 - Voice recorder Dahua Technology - Free user manual and instructions
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| Product Type | Voice Recorder |
| Brand | Dahua Technology |
| Model | X21A3E3 |
| Recording Format | MP3, WAV |
| Internal Storage | 8 GB |
| Expandable Storage | microSD card up to 32 GB |
| Battery Type | Rechargeable Lithium-ion |
| Battery Life | Up to 20 hours continuous recording |
| Charging Port | USB-C |
| Dimensions | 100 x 28 x 12 mm |
| Weight | 50 g |
| Recording Modes | Voice activated, continuous, timed |
| Playback | Built-in speaker, 3.5 mm headphone jack |
| Connectivity | USB 2.0, microSD slot |
| Special Features | Voice activation, noise reduction, password protection, variable playback speed |
| Warranty | 1 year |
Frequently Asked Questions - X21A3E3 Dahua Technology
How do I turn the Dahua X21A3E3 voice recorder on and off?
Press and hold the Power button for 2 seconds to turn on or off.
How do I start recording?
Press the Record button (marked with a red dot). The device will vibrate or show a recording indicator. Press again to stop and save.
How do I transfer recordings to a computer?
Connect the recorder to a computer using the supplied USB-C cable. It will appear as a removable drive. Copy the files (MP3/WAV) from the recorder's RECORD folder.
What is the battery life and charging time?
The Lithium-ion battery provides up to 20 hours of continuous recording. Full charging via USB-C takes about 2 hours.
Can I expand the storage?
Yes, it supports microSD cards up to 32 GB. Insert the card into the slot; the recorder will automatically save files to the external card if present.
Can I use the recorder while it is charging?
Yes, the recorder can be operated normally while connected to a power source via USB-C.
How does the voice activation mode work?
In Voice Activation (VOX) mode, the recorder starts recording only when sound is detected and pauses when silence resumes. This saves storage and battery.
How do I adjust playback speed?
During playback, press the Speed button (or navigate via menu) to cycle through speeds: 0.5x, 0.7x, 1.0x, 1.5x, 2.0x.
Can I protect recordings with a password?
Yes, the recorder offers password protection. Set a password via the settings menu to access files. Note: This does not encrypt the files on the computer.
Is the X21A3E3 waterproof or shockproof?
No, it is not waterproof or shockproof. Avoid exposure to moisture, dust, and drops. Use a protective case when transporting.
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