1. Úvod
The EVISTR V508 is a portable digital voice recorder designed for capturing high-quality audio in various settings such as lectures, meetings, and interviews. It features a dual enhanced dynamic noise-canceling microphone for clear stereo recordings at 1536kbps, one-button recording, voice-activated recording (AVR), password protection, and expandable storage. This manual provides detailed instructions for operating and maintaining your device.

Obrázek 1.1: Přední strana view of the EVISTR V508 Digital Voice Recorder, showing the display, control buttons, and microphone grille.
2. Začínáme
2.1 Obsah balení
- EVISTR V508 Digital Voice Recorder
- USB kabel
- Sluchátka
- Uživatelská příručka (tento dokument)
2.2 Nabíjení zařízení
Before first use, fully charge the device. Connect the EVISTR V508 to a computer USB port or a USB wall adapter using the provided USB cable. The battery indicator on the display will show charging status. A full charge typically takes a few hours and provides up to 45 hours of recording time.
2.3 Zapnutí/vypnutí
- Zapnutí: Slide the power switch to the 'ON' position. The device will boot up and display the main interface.
- Vypnutí: Slide the power switch to the 'OFF' position. Ensure all recordings are saved before powering off.
2.4 Initial Setup (Date and Time)
Upon first use or after a factory reset, you may need to set the date and time. Navigate to the 'Settings' menu, select 'Date & Time', and adjust the year, month, day, hour, and minute using the navigation buttons. Confirm your selection to save.
3. Základní obsluha
3.1 Záznam zvuku
The EVISTR V508 features a one-button recording function for ease of use.
- Ujistěte se, že je zařízení zapnuté.
- To start recording, push the 'REC' button (usually a slider switch) upwards. The recording indicator will illuminate, and the display will show the recording time.
- To save the recording, push the 'REC' button downwards. The file se automaticky uloží.

Image 3.1: Illustration of pushing the 'REC' button up to start recording and pushing it down to save the recording.
3.2 Přehrávání
Pro přehrání nahraného záznamu files:
- From the main menu, navigate to 'Recordings' or 'Files'.
- Pomocí navigačních tlačítek vyberte požadovaný zvukový soubor file.
- Stisknutím tlačítka „Přehrát/Pozastavit“ spusťte přehrávání.
- Press 'Play/Pause' again to pause.
- Use the 'Next/Previous' buttons to skip between files nebo rychlé převíjení vpřed/vzad v rámci file.
3.3 Nastavení hlasitosti
During playback, use the dedicated volume buttons (usually '+' and '-') on the side of the device to increase or decrease the audio output level.
4. Pokročilé funkce
4.1 Voice Activated Recording (AVR/VOR)
The Voice Activated Recording (AVR) mode allows the recorder to automatically start recording when sound is detected and pause when silence occurs, saving memory and battery life.
- Přejděte do nabídky „Nastavení“.
- Select 'AVR Mode' or 'VOR Mode'.
- Choose the desired sensitivity level (e.g., high, medium, low).
- Activate AVR mode. When you start recording, the device will only capture audio when sound is present.

Image 4.1: Diagram illustrating how Voice Operated Recording (VOR) captures only the audible parts of a sound wave, reducing silent segments.
4.2 Ochrana heslem
To protect your recordings, you can set a password for the device.
- Go to the 'Settings' menu.
- Select 'Password' or 'Security'.
- Choose 'Set Password' and follow the on-screen prompts to enter a 6-digit password using the navigation buttons.
- Confirm the password. The device will now require this password to access its contents.

Image 4.2: Display showing the password input screen on the EVISTR V508, indicating the device's privacy protection feature.
4.3 Line-in Recording
The line-in feature allows you to record audio directly from external sources such as another audio player or a microphone with a 3.5mm output.
- Connect the external audio source to the 'Line-in' port on the EVISTR V508 using an appropriate audio cable.
- Start recording as usual. The device will capture audio from the connected source.
4.4 MP3 Player Functionality
The EVISTR V508 can also function as an MP3 player. You can store music files (MP3/WAV/FLAC/APE/OGG/WMA formats) in a dedicated 'MUSIC' folder (or outside the 'RECORD' folder) on the device's internal memory or an inserted MicroSD card.
- Přenos hudby filez vašeho počítače do zařízení.
- Navigate to the 'Music' menu on the device.
- Select and play your desired music files.
4.5 External Storage (MicroSD Card)
The device supports MicroSD cards for expanded storage capacity, allowing you to record more audio or store additional media files.
- Najděte na zařízení slot pro kartu MicroSD.
- Gently insert a compatible MicroSD card (up to 64GB, though 32GB is mentioned in specs) until it clicks into place.
- The device will automatically detect the external storage. You can then select whether to save recordings to internal memory or the MicroSD card via the settings.

Image 4.3: The EVISTR V508 highlighting its MicroSD card support for expanded memory, alongside other features like password protection and auto-record.
4.6 Auto Record (Scheduled Recording)
You can schedule the device to start and stop recording automatically at specific times.
- Ensure the power button is in the 'ON' position for scheduled recording to function.
- Navigate to 'Settings' and select 'Auto Record' or 'Scheduled Recording'.
- Set the desired start time and end time for the recording.
- Activate the auto-record function.

Image 4.4: Visual representation of the Auto Record feature, showing how to set start and end times for automatic recording, with an important note to keep the power button in the 'ON' position.
4.7 Sledování záznamů
The record monitor function allows you to listen to the audio being recorded in real-time through earphones or an external microphone connected to the device.
- Connect earphones to the headphone jack.
- Spusťte nahrávání.
- Activate the 'Record Monitor' option in the recording settings (if available) or simply listen through the connected earphones.

Image 4.5: A user monitoring a recording with the EVISTR V508, demonstrating the ability to record and listen simultaneously using headphones or an external microphone.
5. File Řízení
5.1 Připojení k počítači
You can connect the EVISTR V508 to a computer (Windows or Mac) to transfer files.
- Ujistěte se, že je zařízení zapnuté.
- Připojte zařízení k počítači pomocí dodaného kabelu USB.
- Zařízení se v počítači zobrazí jako vyměnitelná disková jednotka.

Image 5.1: The EVISTR V508 connected to a laptop via USB cable, illustrating its charging and data download capabilities for both Mac and Windows systems.
5.2 Převod Files
Once connected to a computer, you can drag and drop audio files from the device's 'RECORD' folder to your computer, or vice versa for music files.
5.3 Mazání Files
Files can be deleted directly from the device or via a connected computer.
- Na zařízení: Navigate to the 'Recordings' or 'Files' menu, select the file you wish to delete, and choose the 'Delete' option. Confirm your selection.
- Přes počítač: Access the device's storage on your computer, select the desired files, and delete them as you would any other file na vašem počítači.
6. Údržba
6.1 Péče o baterii
- Vyhněte se častému úplnému vybíjení baterie.
- Zařízení pravidelně nabíjejte, i když jej nepoužíváte, abyste zachovali jeho stav.
- Pokud zařízení nebudete delší dobu používat, skladujte jej na chladném a suchém místě.
6.2 Čištění
- K čištění vnějších částí zařízení používejte měkký, suchý hadřík.
- Nepoužívejte tekuté čisticí prostředky ani rozpouštědla, protože by mohly poškodit zařízení.
- Keep the microphone grille free from dust and debris for optimal audio quality.
6.3 Skladování
Store the device in a protective case or pouch to prevent scratches and damage. Avoid exposing it to extreme temperatures, humidity, or direct sunlight.
7. Řešení problémů
7.1 Zařízení se nezapíná
- Ujistěte se, že je baterie nabitá. Připojte zařízení ke zdroji napájení a nechte jej nabíjet alespoň 30 minut.
- Check the power switch position. Make sure it is firmly in the 'ON' position.
- If the device is unresponsive, try performing a soft reset by pressing and holding the power button for 10-15 seconds.
7.2 Špatná kvalita nahrávky
- Ujistěte se, že mikrofon není nijak zakrytý.
- Check the recording settings (e.g., bitrate, microphone sensitivity). Higher bitrate (1536kbps) generally provides better quality.
- Nahrávejte v tichém prostředí, abyste minimalizovali hluk v pozadí.
- If using AVR mode, adjust the sensitivity level.
- Consider using an external microphone for specific recording needs.

Image 7.1: Close-up of the EVISTR V508's enhanced microphone, illustrating its capability to record clear stereo audio from various distances.
7.3 Cannot Connect to Computer
- Ujistěte se, že je kabel USB bezpečně připojen k zařízení i k počítači.
- Zkuste jiný port USB na počítači.
- Zkuste jiný kabel USB.
- Restart both the device and the computer.
7.4 Zapomenuté heslo
If you forget your password, you may need to perform a factory reset. Please note that a factory reset will erase all data on the device. Refer to the device's settings menu for the factory reset option or contact customer support for assistance.
8. Specifikace
| Funkce | Specifikace |
|---|---|
| Značka | EVISTR |
| Model | V508 |
| Rozměry produktu | 10.01 x 2.69 x 1.19 cm |
| Hmotnost položky | 73 g |
| Kapacita paměti | 16GB (Internal), expandable via MicroSD (up to 64GB) |
| Digitální kapacita úložiště | 8 GB (Internal, as per some listings) |
| Vyjímatelná paměť | MicroSD |
| Hardwarové rozhraní | USB 3.0 typ C |
| Kompatibilní zařízení | MP3 přehrávač |
| Technologie displeje | LCD |
| Velikost stálé obrazovky | 1.4 palce |
| Formát mikrofonu | Built-In (Dual enhanced dynamic noise-canceling) |
| svtage | 3.7 voltů |
| Průměrná životnost baterie | 45 Hours (recording) |
| Typ baterie | 1 Lithium Polymer (součástí balení) |
| Formát médií | MP3 Audio, WAV, FLAC, APE, OGG, WMA |
9. Záruka a podpora
EVISTR products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or visit the official EVISTR webUschovejte si účtenku jako doklad o koupi pro případ reklamace.





