Product Overview
The EACH AntDau71 RL-9909 Two-Way Window Intercom System is designed for clear, automatic two-way communication in environments with security barriers, such as bank counters, ticket booths, and offices. It features anti-interference and noise cancellation for optimal audio quality. Separate volume controls are provided for both internal and external audio.

Figure 1: AntDau71 Two-Way Window Intercom System in a typical application setting.
Video 1: Overview of the AntDau71 Two-Way Intercom System, demonstrating its functionality.
Package Contents
Verify that all items are present in the package:
- 1x Main Intercom Unit (Master Station)
- 1x External Speaker (Sub-station)
- 1x Power Adapter
- 1x Audio Cable (for external speaker connection)

Figure 2: All components included in the AntDau71 RL-9909 package.
Setup Instructions
- Connect the External Speaker: Plug the audio cable from the external speaker into one of the "EXT" ports on the back of the main intercom unit.
- Connect Power: Plug the power adapter into the "DC 9V" power jack on the back of the main unit, then connect the adapter to a power outlet.
- Power On: Flip the ON/OFF switch on the main unit to the "ON" position. The power indicator light should illuminate.

Figure 3: Rear panel connections of the main unit, showing power, extension, and record ports.
Operating Instructions
The AntDau71 RL-9909 features automatic two-way communication. No buttons need to be pressed for standard conversation.
Volume Adjustment
- Inside Volume (IN): Use the "IN" knob on the main unit to adjust the volume of the external speaker's audio heard by the internal operator.
- Outside Volume (OUT): Use the "OUT" knob on the main unit to adjust the volume of the main unit's audio heard by the external guest.

Figure 4: The external speaker unit, which provides audio to the outside guest.
Mute Function
The main unit includes a mute button to temporarily disable audio transmission in either direction:
- Press the "MUTE" button to mute the microphone. Press again to unmute.
Maintenance
To ensure the longevity and optimal performance of your intercom system, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the surfaces of the main unit and external speaker. Avoid using abrasive cleaners, solvents, or strong chemicals.
- Environment: Keep the device in a dry environment, away from direct sunlight, extreme temperatures, and high humidity.
- Cables: Regularly check all cables for any signs of wear or damage. Replace damaged cables immediately to prevent malfunction or safety hazards.
- Storage: If storing the unit for an extended period, disconnect it from power and store it in its original packaging or a protective container.
Troubleshooting
If you encounter issues with your AntDau71 RL-9909 Intercom System, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from either unit. |
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| Distorted or unclear sound. |
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| One-way communication only. |
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Specifications
| Feature | Detail |
|---|---|
| Operating Voltage | DC 9V |
| Main Speaker Output | 2W |
| Secondary Speaker Output | 2W |
| Internal Microphone Sensitivity | -48dB±2db (20Hz-20kHz) |
| External Microphone Sensitivity | -48dB±2db (20Hz-16KHz) |
| Main Unit Dimensions | Approx. 158 x 87 x 46 (335) mm |
| External Speaker Dimensions | Approx. 91 x 77 x 23 mm |
| Microphone Form Factor | Gooseneck |
| Power Source | Corded Electric |
| Signal-to-Noise Ratio | 60 dB |
| Number of Channels | 1 |
| Frequency Response | 100 Hz |
| Color | Grey |
| Item Weight | 10 Grams |
| Connectivity Technology | AUX |
Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact the retailer. Keep your proof of purchase for any warranty claims.