HA-MIC04

AI Voice Recorder with WiFi

---

Table of Contents

1. Product Overview
2. App Download
3. Pairing & Connection
4. Button Controls
5. Operational States
6. LED Indicators
7. Power Management
8. Modes of Operation
9. Internal Storage Recording
10. WiFi Configuration
11. Firmware Update
12. FAQ (Frequently Asked Questions)
13. Experimental Features

---

Product Overview

The HA-MIC04 is an AI-powered voice recorder with WiFi capabilities, designed for seamless voice interaction and recording.

📦 What's in the box?

• 1 x HA-MIC04 Device
• 1 x Type-C Charging Cable

📄 Technical Specifications:

Feature	Details
Product Name	AI Voice Recorder
WiFi Standard	IEEE802.11 b/g/n
Bluetooth Version	V5.3
Transmission Frequency	2.4-2.48 GHz
Transmission Distance	10 m
Storage Capacity	1GB SD NAND
Feedback	Buzzer + Vibration motor
Charging Interface	Type-C
Charging Voltage	5V / 1A
Charging Time	0.5 hours
Talk Time	~70 hours
Standby Time	~2000 hours
Battery Capacity	3.7V, 650mAh
Material	Aluminum Alloy + PCBA
Net Weight	36g
Dimensions	65 × 22.6 × 16 mm

---

App Download

Download the Hearit.AI app from:

• Android
• iOS

Alternatively, search for "Hearit.AI" in Google Play Store or Apple App Store.

---

Pairing & Connection

1. Launch the app and create an account or sign in.
2. Select your language.
3. Long-press the front button for 3 seconds to power on the device.
   • Confirmation: Buzzer sound + steady blue LED.
4. Enable Bluetooth on your phone and select your device in the app.
5. Tap "Start Using" to enter the main interface.

---

Button Controls

Front Button (Main Control)

Power On/Off

• Long-press (3 seconds):
  • Turns the device on/off.
  • Feedback: Buzzer sound + steady blue LED (when powered on).

Start/Stop Recording

• Single press:
  • Starts or stops recording.
  • Feedback: Short vibration + single beep.
  • LED Status:
    • Blue (low): Not recording.
    • Blue (high): VAD (Voice Activity Detection) inactive.
    • Purple: VAD active (recording mode with audio input).

Local Storage Recording (Firmware v1.5.0+)

• Double press (when Bluetooth is disconnected):
  • Starts or stops recording to internal storage.
  • Feedback: Short vibration + single beep.
  • LED Status:
    • Blue (low): Not recording.
    • Blue (high): VAD inactive.
    • Purple: VAD active (recording mode with audio input).

OTA Updates

• Press 5 times quickly:
  • Checks for firmware updates.
  • LED Status:
    • Steady yellow: Checking for updates.
    • Flashing yellow: Update in progress.
    • Flashing red: WiFi issue or update failed.
    • Flashing white: No updates available.

Factory Reset

• Press 3 times quickly, then hold:
  • Resets the device to factory settings.

Firmware Update Mode

• Press 5 times quickly, then hold:
  • Enters firmware update mode.

Side Button (Mode Switch)

Switch Modes

• Single press: Cycles through modes:
  • Translation Mode 🌍
  • Meeting Mode 📓
  • Custom Mode 🤖
  • Note-Taking Mode ✍️
• Confirmation:
  • Voice prompt via app + short vibration.

---

Operational States

Basic Controls

#	Function	Precondition	Steps	Expected Result	Buzzer Feedback	LED Status
1	Power On	Device in sleep mode	Click front/side button	Device wakes up & broadcasts BLE	None	Red/Blue alternating flashes (3x)
2	Power On	Device awake, BLE disconnected	Click/hold front/side button	"BLE disconnected" prompt	2 short beeps	Red flashes every 0.5s (2x)
3	Sleep Mode	Device awake, BLE disconnected	Wait >5 minutes	Device enters sleep mode	None	None
4	Pairing Success	BLE disconnected	Paired with app	Pairing completed	None	Blue flashes every 0.8s (3x)
5	Start/Stop Recording	BLE connected	Click front button	Audio streams to app	1 short beep	Blue solid (recording)
6	Switch Mode	BLE connected	Click side button	Mode changed via app	None	Blue flashes once
7	TTS Playback	BLE connected	Hold side button	App announces current mode	None	Blue flashes once
10	BLE Disconnect	BLE connected	Phone disconnects	Connection lost	None	Red flashes every 0.5s (3x)
11	Reconnect	BLE disconnected, app active	Bluetooth enabled	Auto-reconnect to phone	None	Blue flashes every 0.8s (3x)
12	Low Battery Alert	Device in use	Battery ≤10%	Alert every 1 minute	1 long beep	Red flashes every 0.8s (2x)
13	Charging	Device charging	USB-C connected	Charging activated	None	Green solid
14	Fully Charged	Battery 100%	USB-C connected	Charging completed	None	Green LED off

---

LED Indicators

State	LED Pattern	Meaning
Power On	Red/Blue alternating flashes (3x)	Device waking up
BLE Disconnected	Red flashes (2x, 0.5s interval)	Connection lost
Pairing Success	Blue flashes (3x, 0.8s interval)	Pairing successful
Recording	Blue solid / Purple (VAD active)	Recording active
Mode Switch	Blue flash (1x)	Mode changed
Low Battery	Red flashes (2x, 0.8s interval)	Battery ≤10%
Charging	Green solid	Charging in progress
Full Charge	LED off	Charging complete
OTA Update	Yellow steady/flashing	Update in progress
Factory Reset	Red steady	Reset in progress

---

Power Management

Charging

• Interface: USB-C port
• Status:
  • Charging: Green LED solid
  • Full: LED turns off

Low Battery Alert

• Trigger: Battery ≤10%
• Reminder:
  • One long beep every minute
  • Red LED flashes every 0.8s, twice

---

Modes of Operation

Translation Mode 🌍

• AI-powered translation with voice output
• Auto-detects spoken language
• Great for international conversations

Meeting Recorder 📓

• Record meetings with high-quality audio
• Convert speech to text with accuracy
• Get organized meeting summaries

Custom Model 🤖

• Add your own AI instructions
• Choose from ready-to-use models
• Adapt to different scenarios

Note Taking Mode ✍️

• Speak your tasks naturally
• Auto-organize into categories
• Smart deadline detection

---

Internal Storage Recording

Starting with firmware v1.5.0, the HA-MIC04 supports recording directly to its internal storage without requiring an active Bluetooth connection.

How to Use

1. Start Recording:

   • Ensure the device is powered on and Bluetooth is disconnected
   • Double-press the front button to start recording
   • Feedback: Short vibration + single beep
   • LED Status: Blue (high) when VAD is inactive, Purple when VAD is active

2. Stop Recording:

   • Double-press the front button again
   • Feedback: Short vibration + single beep
   • Recording will be saved to internal storage

Accessing Recorded Files

1. Connect your HA-MIC04 to a computer using a USB cable
2. The device will appear as a USB mass storage device (similar to a USB flash drive)
3. Browse to the device and access your recorded audio files
4. Copy files to your computer as needed

Technical Details

• Files are saved in standard audio format
• Storage is accessible via standard USB file transfer protocols
• No special software required to access recordings
• Device operates like a standard USB flash drive when connected to a computer

---

WiFi Configuration

1. Connect to WiFi Configuration Portal

1. Visit https://hearit.ai/wifi/ in your web browser
2. Enter your WiFi network name (SSID) and password
3. Important: Make sure your WiFi network operates on the 2.4GHz frequency band

2. Connect Your Device

1. Click "Start Configuration"
2. When prompted, search for and connect to your MIC04 device

3. Transfer WiFi Credentials

The website will automatically transmit your WiFi credentials to your MIC04 device

---

Firmware Update

Regular firmware updates ensure your HA-MIC04 device operates with the latest features and optimizations. This section explains how to update your device's firmware over-the-air (OTA).

Prerequisites

• Your MIC04 device must be connected to a 2.4GHz WiFi network
• Ensure your device has at least 50% battery charge
• Make sure the device is within good WiFi signal range

Update Procedure

1. Configure WiFi Connection

Before updating firmware, make sure your device is properly connected to WiFi by following the WiFi Configuration instructions above.

2. Initiate Firmware Update

1. Ensure your device is powered on and connected to WiFi
2. Quickly press the Front Button 5 times in succession
3. The device will automatically check for available updates

3. Monitor Update Progress

The LED indicator provides real-time feedback on the update process:

LED Status	Meaning	Action Required
Steady Yellow	Checking for updates	Wait while the device connects to the update server
Flashing Yellow	Update in progress	Do not turn off or reset the device during this process
Flashing Red	WiFi issue or update failed	Check your WiFi connection and try again
Flashing White	No updates available	Your device already has the latest firmware

4. Update Completion

When the update process completes successfully:

• The device will automatically restart
• The LED will return to its normal state
• Your device will be ready to use with the latest firmware improvements

Latest Firmware Features

Version 1.5.0

• Internal Storage Recording: Record audio directly to device storage without requiring a Bluetooth connection
• Access recordings by connecting the device to a computer via USB cable
• Improved voice activity detection (VAD) algorithms
• Various bug fixes and performance improvements

Troubleshooting

If your firmware update fails (indicated by flashing red LED):

1. Check that your WiFi network is operating on the 2.4GHz band (5GHz is not supported)
2. Ensure your WiFi signal is strong where the device is located
3. Verify your WiFi network has internet access
4. Try moving closer to your WiFi router
5. Restart your device and try the update process again

---

FAQ (Frequently Asked Questions)

1. How do I switch between modes?

   • Press the side button once to cycle through available modes.

2. What happens when the battery is low?

   • Device will provide voice and LED alerts every minute when battery is ≤10%.

3. How do I update the firmware?

   • Press the front button 5 times quickly to check for updates.

4. How do I record without connecting to my phone?

   • Make sure your device has firmware v1.5.0 or higher
   • With Bluetooth disconnected, double-press the front button to start/stop recording
   • Connect the device to a computer via USB to access recordings

5. What should I do if the device doesn't connect?

   • Ensure Bluetooth is enabled on your phone.
   • Try resetting the device by pressing the front button 3 times quickly, then hold.

---

Experimental Features

• Several experimental features are available in the web-demo version.
• Web-demo supports Windows, macOS, Android (iOS not supported).
• Access via webdemo.hearit.ai.