Introduction
The EVISTR V509 is a versatile 16GB digital voice recorder designed for high-quality audio capture in various settings, including lectures, meetings, and interviews. It features premium sound recording, voice activation, password protection, and variable speed playback, making it an ideal tool for professionals and students alike. This manual provides comprehensive instructions for setting up, operating, and maintaining your device.
Product Overview
Familiarize yourself with the components of your EVISTR V509 digital voice recorder.

Image: Front view of the EVISTR V509 Digital Voice Recorder, showing the screen, control buttons, and side switches. Two AAA batteries are shown next to the device, indicating its power source.
Key Features:
- 1536kbps Premium Quality Sound: High-sensitivity omnidirectional microphone and DSP dynamic noise cancellation chip for clear audio.
- Voice Activated Recording (VAR): Adjustable sensitivity levels (7 levels) to capture only spoken words.
- Password Protection: Secure your recordings with a 4-digit password.
- Long Battery Life: Up to 85 hours of continuous recording with 2 AAA batteries.
- Expandable Memory: 16GB built-in memory, expandable up to 64GB with a TF card (not included).
- Simple Operation: One-button recording and saving.
- Playback Functions: A-B repeat, fast forward, rewind, and variable speed playback.
- USB Type-C Connectivity: For high-speed data transmission to computers.
Setup
1. Battery Installation
The EVISTR V509 is powered by two AAA batteries. Batteries are not included in the package.
- Locate the battery compartment cover on the back of the device.
- Slide the cover open.
- Insert two AAA batteries, ensuring correct polarity (+ and -) as indicated inside the compartment.
- Close the battery compartment cover securely.

Image: Rear view of the EVISTR V509 showing the open battery compartment with two AAA batteries inserted. A note indicates that batteries are not included.
2. Powering On/Off
- To power on, slide the ON/OFF switch to the ON position.
- To power off, slide the ON/OFF switch to the OFF position.
3. Inserting a TF Card (Optional)
The device supports up to 64GB TF card expansion for additional storage.
- Locate the TF card slot on the side of the recorder.
- Gently insert the TF card into the slot until it clicks into place.
- To remove, push the TF card inward until it springs out.

Image: A hand inserting a TF card into the side slot of the EVISTR V509 recorder, illustrating memory expansion capability.
Operating Instructions
1. Basic Recording
- To start recording: Press the REC button (red button). The screen will display "Recording..." and the recording timer will start.
- To save recording: Press the REC button again. The recording will be saved automatically.

Image: Close-up of the EVISTR V509's control panel, highlighting the REC button for recording and saving, the Lock button for preventing accidental touches, and the Play button for playback.
2. Playback
- To play a recording: In stop mode, press the PLAY/PAUSE button.
- To pause/resume playback: Press the PLAY/PAUSE button during playback.
- To navigate recordings: Use the Previous/Next buttons to select different files.
- To adjust volume: Use the +/- buttons.
3. Voice Activated Recording (VAR)
The VAR function allows the recorder to start recording automatically when sound is detected and pause when silence occurs, saving memory and battery life. The V509 offers 7 sensitivity levels.
- Access the menu and navigate to the VAR settings.
- Select your desired sensitivity level (Level 1 is most sensitive, Level 7 requires louder sound).
- Activate VAR mode. The recorder will now only record when sound is present.

Image: The EVISTR V509 screen displaying recording status, with illustrations showing how different sound levels (whisper vs. loud voice) correspond to VAR activation at different sensitivity settings (Level 1 vs. Level 7).
4. Password Protection
You can set a 4-digit password to prevent unauthorized access to your device and recordings.
- Go to the device settings menu.
- Select "Password" or "Security" option.
- Enter a new 4-digit password using the navigation buttons.
- Confirm the password.
- Once enabled, the device will require the password upon startup.
Important: Remember your password. If you forget it, you may not be able to access your recordings. Do not set a password if you plan to use the auto-timing record feature.

Image: The EVISTR V509 screen displaying "Input new Password" with four zeros, next to an illustration of a padlock, indicating the strong password protection feature.
5. File Management and Connecting to Computer
You can easily transfer and manage your recording files by connecting the V509 to a computer.
- Connect the recorder to your computer using the provided USB Type-C cable.
- The device will appear as a removable disk drive on your computer (compatible with Windows 98 and later, XP, 7/8/10, and Mac OS).
- You can then drag and drop files, delete, or organize them as you would with any other storage device.
- Supported audio formats include MP3, WAV, FLAC, APE, OGG, WMA.

Image: The EVISTR V509 connected to a laptop via a USB Type-C cable, demonstrating easy file management and compatibility with various operating systems and audio formats.
6. A-B Repeat Function
The A-B repeat function allows you to loop a specific segment of an audio file for repeated listening.
- During playback, press the A-B button at the desired starting point (A).
- Press the A-B button again at the desired ending point (B).
- The recorder will now continuously play the segment between A and B.
- Press the A-B button a third time to exit the repeat mode.

Image: The EVISTR V509 recorder with arrows indicating fast forward and rewind, and a microphone icon, representing the A-B repeat function for reviewing specific audio segments.
7. Variable Speed Playback
Adjust the playback speed to listen to recordings faster or slower, which is useful for reviewing long recordings or transcribing.
- During playback, access the playback settings or press a dedicated speed adjustment button (refer to the device's on-screen menu for exact controls).
- Adjust the speed level (e.g., Level 16 for faster playback).
Maintenance
- Keep the device dry. Avoid exposure to water or high humidity.
- Clean the device with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Avoid dropping the device or subjecting it to strong impacts.
- Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- If not using for an extended period, remove the batteries to prevent leakage.
Troubleshooting
| Problem | Possible Solution |
|---|---|
| Device does not power on. |
|
| Poor recording quality. |
|
| Cannot access files on computer. |
|
| Device is locked / Forgot password. |
|
| Recordings are too quiet or too loud (VAR). |
|
Specifications
- Model: V509
- Brand: EVISTR
- Memory Storage Capacity: 16 GB (built-in), expandable up to 64 GB with TF card (not included)
- Audio Recording Quality: 1536kbps (WAV)
- Supported Audio Formats: MP3, WAV, FLAC, APE, OGG, WMA
- Microphone: High-sensitivity omnidirectional, Stereo, Built-In
- Display: LCD, 1.1 Inches
- Power Source: 2 x AAA batteries (1.5V 2A Alkaline dry battery)
- Battery Life: Up to 85 hours (recording at 32kbps)
- Hardware Interface: USB Type-C
- Compatible Devices: MP3 Player, PC (Windows 98+, XP, 7/8/10, Mac)
- Special Features: HD Recording, Professional, built-in microphone, External microphone support, built-in speaker, Pocket design, external headphone jack (3.5mm), Voice Activated, USB Port, TF Card slot, Password Protection, A-B Repeat, Variable Speed Playback.
- Product Dimensions: 11 x 3.8 x 1.9 cm
- Item Weight: 191 g
Warranty and Support
EVISTR products typically come with a standard manufacturer's warranty. For specific warranty details, technical support, or service inquiries, please refer to the warranty card included with your product or visit the official EVISTR website. You can also contact their customer service team for assistance with any operational issues or product-related questions.
For video tutorials and further assistance, please check the official EVISTR support channels.