DR 428 - Voice recorder Trevi - Free user manual and instructions

Type of Product	Voice Recorder
Brand	Trevi
Model	DR 428
Recording Format	MP3 / WAV
Internal Memory	8 GB
Recording Time	Up to 140 hours
Battery Type	Rechargeable Li-Ion (USB)
Playback	Built-in speaker and headphones jack
Connectivity	USB 2.0 for data transfer and charging
Dimensions	10.0 x 3.0 x 1.5 cm
Weight	60 g
Display	LED indicator lights
Key Functions	One-touch recording, pause, stop, VOX (voice activated recording)
Cleaning	Wipe with a soft dry cloth; do not use liquids
Safety Cautions	Keep away from moisture and extreme temperatures; use only included cable
Spare Parts / Repairability	Contact Trevi support; battery replacement by qualified technician
General Information	Supports microSD card up to 32 GB (not included)

Frequently Asked Questions - DR 428 Trevi

How do I start recording with the Trevi DR 428?

Press the REC button to start recording. The LED will blink red. Press again to stop and save the file.

How do I transfer recordings to my computer?

Connect the recorder to your computer using the USB cable. It will appear as a removable drive; copy the audio files from the RECORD folder.

What is the battery life of the DR 428?

The built-in Li-Ion battery provides approximately 20 hours of continuous recording. Charge via USB for about 2 hours.

Does the recorder support a microSD card?

Yes, it supports microSD cards up to 32 GB (class 4 or higher). Insert the card into the slot for extended storage.

How do I activate voice activated recording (VOX)?

In the menu, enable VOX mode. The recorder will automatically start recording when sound is detected and pause when silent.

Can I use headphones with this recorder?

Yes, plug standard headphones into the 3.5mm jack for private listening.

How do I delete files from the recorder?

While in playback mode, press and hold the DELETE button until the file is removed. Alternatively, connect to PC and delete files manually.

Is the Trevi DR 428 compatible with all operating systems?

It works with Windows, macOS, and Linux as a mass storage device. No driver installation required.

Why is my recorder not turning on?

Ensure the device is charged. Connect to a USB power source for at least 30 minutes, then press the POWER button.

How do I set the date and time on the recording file?

The DR 428 does not have a built-in clock. Timestamps are based on when the file was created on your computer.

USER MANUAL DR 428 Trevi

»Microphone stereo build-in with 2 levels

»3 levels recordings:

HQ WAV (4,2 h); SP VOC (8,4 h); LP VOC (49 h)

»VAS voice activation

»EDITING functions (Insert, Append & Cut)

»Bookmark on recordings

»USB 2.0 interface connection

»Built-in speaker

»Power supply: 2 Batteries "AAA"

»Dimension: 41x103x17 mm

»Weight: 40g

LOGISTIC INFORMATION

Shipping carton: pcs

Shipping carton size: cm

Unit gross weight: Kg

Giftbox size: 152 x 112 x 37 mm

Colour: White

Cntr 40" pcs - cntr 20" pcs

Web: www.trevi.it

E-mail: [e-mail]

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