1. Introduction
The ChunHee HI03-IM Wireless Intercom System provides reliable two-way communication without the need for Wi-Fi or internet connectivity. Designed for various environments, including homes, offices, and caregiving settings, this system offers 16 channels and adjustable volume levels for clear and efficient communication. Its portable design and long standby time ensure convenience and readiness for use.
2. Package Contents
Please verify that all items are present in your package:
- ChunHee HI03-IM Intercom Units (2)
- USB Charging Cables (2)
- Battery Holders (2)
- Belt Clips (2)
3. Product Overview
Each ChunHee HI03-IM intercom unit features a compact design with essential controls for easy operation.

Image: Two ChunHee HI03-IM wireless intercom units, black, displayed in their charging bases. Each unit has a speaker grille, a power button, and a 'TALK' button on the front face.

Image: A detailed diagram illustrating the controls of the intercom unit. It highlights the Power Button, Talk Button, Type-C Charge Port, Volume Adjust Button, Channel Lock/Unlock Button, Channel Increase Button, and Channel Decrease Button.
Controls and Ports:
- Power Button: Located on the front, press and hold for 3 seconds to turn the unit on or off.
- Talk Button: Large button on the front, press and hold to speak, release to listen.
- Type-C Charge Port: Located on the side for direct charging.
- Volume Adjust Button: Cycles through 4 available volume levels.
- Channel Lock/Unlock Button: Press and hold for 5 seconds to lock or unlock the current channel.
- Channel Increase/Decrease Buttons: Used to select from 16 available channels.
4. Setup
4.1 Initial Charging
Before first use, fully charge both intercom units. Connect the USB-C charging cable to the unit's Type-C port or place the unit in its charging holder connected to a power source. The charging indicator light will show charging status.

Image: A ChunHee intercom unit is shown in its charging base, connected via a USB-C cable to a wall adapter. Information on battery capacity, Type-C charging, 36 hours single use time, and 4 days standby time is displayed.
4.2 Powering On/Off
- To turn on: Press and hold the Power Button for approximately 3 seconds until you hear an audible confirmation.
- To turn off: Press and hold the Power Button for approximately 3 seconds until the unit powers down.
4.3 Setting Channels
For two or more units to communicate, they must be set to the same channel. The system offers 16 channels (1-16).
- With the unit powered on, use the Channel Increase or Channel Decrease buttons on the side to select your desired channel. The unit will audibly announce the selected channel number.
- Repeat this process for all intercom units you wish to link, ensuring they are all on the identical channel.
5. Operating Instructions
5.1 Two-Way Communication
- To speak: Press and hold the large TALK Button on the front of the unit. Speak clearly into the unit.
- To listen: Release the TALK Button. The unit will automatically switch to receive mode.

Image: A split image demonstrating the benefit of the intercom. On the left, a person is shown yelling up a staircase. On the right, a person calmly uses the intercom while cooking, illustrating clear and convenient communication.
5.2 Channel Lock Feature
To prevent accidental channel changes, especially when used by children or the elderly, you can lock the current channel.
- To lock: Press and hold the Channel Lock/Unlock Button (often labeled 'SET' or similar, located on the side) for 5 seconds. An audible confirmation will indicate the channel is locked.
- To unlock: Repeat the process by pressing and holding the Channel Lock/Unlock Button for 5 seconds.

Image: An individual holds the intercom unit, with an inset showing a magnified view of the side buttons, specifically highlighting the 'SET' button used for locking the channel. Text indicates holding the button for 5 seconds to lock the channel.
5.3 Volume Adjustment
The intercom system features 4 adjustable volume levels to suit different environments and user preferences (60dB, 80dB, 100dB, 115dB).
- Press the Volume Adjust Button (located on the side) repeatedly to cycle through the available volume settings. Select the level that provides optimal clarity without being excessively loud.

Image: An intercom unit is placed on a table in an outdoor setting. Graphics overlay indicate 'loud voice', '4 levels of adjustable volume', and a 'transmission distance of 500 meters'.
6. Charging
The ChunHee HI03-IM intercom units are equipped with Lithium Polymer batteries and can be charged via the USB Type-C port or by placing them in their dedicated charging holders.
- Connect the provided USB-C cable to the intercom unit or the charging holder, and then to a standard USB power adapter (not included) or a computer USB port.
- A full charge provides up to 36 hours of single-use operation and up to 4 days of standby time.
- The charging indicator light will provide feedback on the charging status.
7. Maintenance
To ensure the longevity and optimal performance of your ChunHee HI03-IM intercom system, follow these maintenance guidelines:
- Cleaning: Wipe the units with a soft, dry cloth. Do not use abrasive cleaners, solvents, or harsh chemicals.
- Storage: Store the intercoms in a cool, dry place away from direct sunlight and extreme temperatures when not in use for extended periods.
- Battery Care: Avoid fully discharging the battery frequently. For long-term storage, charge the units to about 50% capacity.
- Water Exposure: These units are not waterproof. Avoid exposure to water or high humidity.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No communication between units | Units are on different channels. Channel is locked. | Ensure all units are set to the same channel. Unlock the channel if it is locked by holding the Channel Lock/Unlock button for 5 seconds. |
| Unit does not turn on | Battery is depleted. | Charge the unit using the provided USB-C cable or charging holder. |
| Poor audio quality or static | Units are out of range. Interference from other devices. Low battery. | Move units closer together. Ensure units are within the 1640ft (500m) range. Charge the battery. Try changing to a different channel. |
| Volume is too low/high | Volume level needs adjustment. | Press the Volume Adjust Button to cycle through the 4 available volume levels. |
| Unit accidentally changes channel | Channel lock feature is not activated. | Activate the Channel Lock feature by holding the Channel Lock/Unlock button for 5 seconds. |
9. Specifications
| Brand | ChunHee |
| Model | HI03-IM |
| Dimensions (L x W x H) | 4.68 x 2.16 x 0.87 inches |
| Weight (per unit) | Approx. 0.585 pounds |
| Power Source | Battery Powered |
| Battery Type | Lithium Polymer |
| Charging Port | USB Type-C |
| Battery Life (Single Use) | Up to 36 hours |
| Standby Time | Up to 4 days |
| Connectivity Technology | Wireless |
| Number of Channels | 16 |
| Volume Levels | 4 (60dB, 80dB, 100dB, 115dB) |
| Maximum Range | 1640 feet (approx. 500 meters) |
| Special Features | Keypad Lock, Noise Reduction, Portable, Rechargeable |
10. Warranty and Support
For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official ChunHee website. Keep your purchase receipt as proof of purchase for any warranty claims.





