1. Introduction
The KIMAFUN KM-G150-3 is a personal wireless in-ear monitor (IEM) system designed to provide musicians, singers, and performers with clear and reliable audio monitoring. This system utilizes 2.4G wireless transmission technology, offering stable signal, anti-interference capabilities, and low audio delay. Its compact, battery-powered design ensures portability and freedom of movement during performances, rehearsals, or studio sessions.

Figure 1: KIMAFUN KM-G150-3 Wireless In-Ear Monitor System components.
2. Package Contents
Upon opening your KIMAFUN KM-G150-3 package, please ensure all the following items are present:
- 1 × Transmitter
- 1 × Receiver
- 1 × Monitor Earphones
- 2 × 6.35mm Mono Adapter
- 1 × 6.35mm Stereo Adapter
- 1 × Transmitting Adapter Cable
- 1 × Receiving Adapter Cable
- 1 × Dual USB Charging Cable
- 1 × 3 Pairs Eartips (S, M, L)
- 1 × Carrying Bag

Figure 2: Complete package contents of the KM-G150-3 system.
3. Product Features
- 6 Channels: The system features 6 built-in channels, allowing users to switch between them to avoid interference and find a clear frequency.
- One-to-Many Connectivity: A single transmitter can connect to multiple receivers simultaneously, enabling team monitoring for bands or groups.
- Independent Volume Control: Each receiver unit allows for independent volume adjustment using dedicated plus and minus buttons, providing personalized monitoring levels.
- 2.4G Wireless Transmission: Operates on the 2.4G frequency band, which is globally license-free. This ensures high signal stability, anti-interference performance, and minimal audio delay.
- Extended Range & Battery Life: Offers a wireless transmission distance of 50-65 feet (15-20 meters) in line of sight. The built-in rechargeable lithium battery provides over 6 hours of continuous use after a 2-hour charge.
- Ergonomic In-Ear Monitor Earphones: Includes ergonomically designed earphones with a 45-degree angle for excellent noise reduction, making them suitable for stage performance.
- Versatile Application: Equipped with 1/8" (3.5mm) plugs and 1/4'' (6.35mm) adapters, making it compatible with various devices such as electric guitar amplifiers, stage speakers, outdoor speakers, and recording studios.

Figure 3: Key features of the KIMAFUN Wireless In-Ear Monitor System.
4. Setup Guide
4.1. Initial Charging
Before first use, fully charge both the transmitter and receiver units. Use the provided Dual USB Charging Cable. A full charge takes approximately 2 hours and provides 5-6 hours of working time.

Figure 4: Charging the transmitter and receiver units.
4.2. Connecting the Transmitter
Connect the transmitter to your audio source (e.g., mixer, amplifier, digital sound card) using the appropriate adapter. The transmitter has a 1/8" (3.5mm) jack. Use the included 6.35mm Mono or Stereo Adapters as needed for your device's output.

Figure 5: Transmitter connection options for monitoring music/accompaniment or amplified sound.
4.3. Connecting the Receiver
Plug the included monitor earphones into the 1/8" (3.5mm) earphone socket on the receiver. Ensure the earphones are securely connected.

Figure 6: Ergonomic design of the in-ear monitor earphones.
4.4. Matching Channels
Both the transmitter and receiver have a 'CHANNEL' button. Press this button on both units to cycle through the 6 available channels (CH1-CH6). The channel indicator lights will flash until a successful match is made, then they will become solid. Ensure both units are set to the same channel for proper operation.
Video 1: Overview of the KIMAFUN KM-G150-3 Wireless System, including battery and adapter usage.
Video 2: Demonstrates setting up the KM-G150-3 system, including channel matching and connections.
5. Operating Instructions
5.1. Power On/Off
Locate the ON/OFF switch on the side of both the transmitter and receiver units. Slide the switch to the 'ON' position to power them on. Slide to 'OFF' to power down.
5.2. Volume Adjustment
On the receiver unit, use the '+' and '-' buttons to adjust the monitoring volume to your desired level. Adjust the volume gradually to avoid sudden loud sounds.
5.3. Wearing the Receiver
The receiver unit features a belt clip for convenient attachment to your clothing, allowing for unrestricted movement during use.

Figure 7: Musician using the KIMAFUN system during practice.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the transmitter and receiver. For earphones, gently wipe with a slightly damp cloth and ensure they are completely dry before storage.
- Battery Care: To prolong battery life, avoid fully discharging the units frequently. Charge them regularly, even if not in constant use. Store in a cool, dry place.
- Storage: When not in use, store all components in the provided carrying bag to protect them from dust, moisture, and physical damage.
7. Troubleshooting
- No Sound:
- Ensure both transmitter and receiver are powered on.
- Verify that the transmitter and receiver are on the same channel.
- Check earphone connection to the receiver.
- Confirm the audio source is active and connected correctly to the transmitter.
- Adjust volume levels on both the audio source and the receiver.
- Interference/Poor Sound Quality:
- Switch to a different channel on both the transmitter and receiver to find a clearer frequency.
- Ensure there are no major obstructions (walls, large metal objects) between the transmitter and receiver.
- Move away from other 2.4G wireless devices that might be causing interference.
- Short Transmission Range:
- Ensure line of sight between transmitter and receiver.
- Check battery levels; low battery can affect range.
- Battery Not Charging:
- Verify the USB charging cable is properly connected to both the unit and a power source.
- Try a different USB port or power adapter.
8. Specifications
| Feature | Specification |
|---|---|
| Model Name | KIMAFUN KM-G150-3 |
| Connectivity Technology | 2.4G Wireless |
| Wireless Communication Technology | 2.4G Wireless |
| Frequency Response | 2.4 GHz |
| Headphones Jack | 3.5 mm Jack |
| Transmission Distance | 50-65 feet (15-20 meters) line of sight |
| Battery Type | Lithium Polymer (included) |
| Charging Time | 2 Hours |
| Battery Life | 6 Hours |
| Number of Channels | 6 |
| Control Method | Button Control |
| Material | Acrylonitrile Butadiene Styrene (ABS), Metal |
| Item Weight | 14.1 ounces (400 Grams) |
9. Warranty and Support
KIMAFUN products are designed for reliability and performance. For any warranty claims, technical support, or inquiries regarding your KM-G150-3 Wireless In-Ear Monitor System, please contact KIMAFUN customer service through the retailer where the product was purchased or visit the official KIMAFUN website for support contact information.