HDR325 - Audio recorder HITACHI - Free user manual and instructions
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| Product Type | Audio Recorder |
| Brand | Hitachi |
| Model | HDR325 |
| Dimensions (W x H x D) | 100 x 30 x 15 mm |
| Weight | 110 g (with batteries) |
| Power Source | 2 x AAA batteries or USB 5V DC |
| Battery Life | Up to 20 hours (record), 25 hours (playback) |
| Recording Format | MP3 (128 kbps), WAV (44.1 kHz/16 bit) |
| Storage | Internal 8GB, microSD card slot up to 32GB |
| Microphone | Built-in stereo electret condenser microphone |
| Speaker | Built-in 8 Ohm, 0.5W speaker |
| Recording Modes | Auto, Manual, Voice Activated (VOX) |
| Input | 3.5mm line-in, external microphone jack |
| Output | 3.5mm headphone jack, USB for file transfer |
| Display | OLED screen with backlight |
| Sampling Rates | 8kHz, 16kHz, 22.05kHz, 44.1kHz, 48kHz |
| Signal to Noise Ratio | ≥ 60 dB |
| Maintenance | Clean exterior with dry cloth; avoid moisture; replace batteries promptly |
| Safety | Use only specified batteries; do not disassemble; keep away from children |
| Spare Parts & Repairability | Battery compartment, microSD slot, USB port; consult authorized service center |
Frequently Asked Questions - HDR325 HITACHI
How do I start recording?
Press and hold the REC button for 2 seconds until the red light blinks. Press REC again to pause. Press STOP to finish.
How to transfer files to a computer?
Connect the recorder to your computer via USB cable. The device will appear as a removable drive. Drag and drop the audio files (MP3/WAV) to your computer.
Can I use an external microphone?
Yes, plug a 3.5mm external microphone into the MIC jack. The built-in microphone will be automatically disabled.
What type of memory card does it support?
It supports microSD and microSDHC cards up to 32GB. Format the card as FAT32 before use.
How long does the battery last?
With fresh AAA alkaline batteries, you can record up to 20 hours and play back up to 25 hours. Actual life depends on usage and file format.
How do I reset the device?
Insert a paper clip into the small RESET hole on the bottom. Hold for 5 seconds. This clears all settings but not your recordings.
Why is the recording volume low?
Check the Mic Sensitivity setting in the menu. Set it to High for quiet environments. Also ensure the microphone hole is not blocked.
Can I set a timer for recording?
Yes, go to Menu > Timer Record. Set the start time and duration. The recorder will automatically start and stop.
The device won't turn on. What should I do?
First, replace the batteries with fresh ones. Check that the batteries are inserted with correct polarity. If still no power, connect USB charger; if it works, the battery contacts may be dirty.
How to delete a file?
In playback mode, press Menu, select Delete, choose Single or All. Confirm with REC. Deleted files cannot be recovered.
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