1. Introduction
The Retekess TT117 FM Tour Guide System is designed for clear, interference-free communication in various settings such as tours, conferences, and simultaneous interpretation. This manual provides detailed instructions for setting up, operating, and maintaining your TT117 system to ensure optimal performance.

Image: The Retekess TT117 FM Tour Guide System, showing one transmitter unit and multiple receiver units with earphones.
2. Package Contents
Please check the package contents upon arrival. If any items are missing or damaged, contact your vendor.
- 1 x Wireless Transmitter
- 20 x Wireless Receivers
- 1 x Lavalier Microphone
- 20 x Single Earphones
- 21 x Lanyards
- 1 x English Manual

Image: A visual representation of all items included in the Retekess TT117 package, neatly arranged.
3. Product Overview
3.1. Design and Portability
The TT117 system features a portable, five-button design for ease of use. Both the transmitter and receivers are compact and lightweight, making them convenient for extended use.

Image: A comparison of the transmitter and receiver sizes, showing their compact dimensions (Transmitter: 99mm H x 56mm W x 14mm D; Receiver: 92mm H x 53mm W x 20mm D).
3.2. LCD Screen
Each unit is equipped with an LCD screen that displays important information such as the current channel and battery status, ensuring easy operation and monitoring.

Image: The LCD screen of the TT117 transmitter, clearly showing the channel number and battery level indicator.
4. Setup
4.1. Battery Installation
The TT117 system operates on 2 AA batteries (not included). Ensure batteries are inserted with correct polarity. The fluctuating on-off key helps save battery power.

Image: An illustration showing the battery compartment of a TT117 unit with two AA batteries, indicating approximate working times of 8 hours for the transmitter and 10 hours for the receiver.
4.2. Connecting Accessories
Connect the lavalier microphone to the transmitter's MIC jack and the single earphones to the receivers' headphone jacks. The transmitter also supports AUX stereo mode transmission for external audio input.

Image: A detailed view of the top of the TT117 transmitter, highlighting the AUX and MIC input ports, along with a lock switch.
5. Operating Instructions
5.1. Power On/Off
Use the power switch to turn the transmitter and receivers on or off. The fluctuating on-off key helps conserve battery life.
5.2. Channel Adjustment
The system features 17 channels, allowing up to 8 groups to operate simultaneously without interference. Use the 'CH+' and 'CH-' buttons on both the transmitter and receivers to select the desired channel. Ensure all receivers are set to the same channel as the transmitter for proper communication.

Image: A diagram showing how the 17 available channels can be used to support up to 8 independent groups operating simultaneously, each on a different channel.
5.3. Volume Adjustment
Adjust the volume on the receivers using the 'VOL+' and 'VOL-' buttons to suit individual listening preferences.
5.4. Mute Function
The transmitter includes a one-key mute function, allowing the speaker to temporarily silence the audio transmission.
5.5. Lock Function
A lock function is available to prevent accidental changes to settings during operation.

Image: A close-up view of the TT117 transmitter, highlighting the dedicated buttons for one-key lock and one-key mute functions.
5.6. Transmission Distance
The TT117 system offers a long transmission distance of up to 80 meters (262 feet), allowing participants to move freely while maintaining clear audio reception.

Image: A visual representation of the TT117 system's working distance, showing a transmitter and receiver communicating effectively over 80 meters (262 feet) in a classroom setting.
5.7. Adding Receivers
A single transmitter can support an unlimited number of receivers, making it scalable for various group sizes.

Image: A diagram illustrating how one TT117 transmitter can broadcast audio to numerous receivers simultaneously, indicating scalability.
6. Applications
The Retekess TT117 FM Tour Guide System is suitable for a wide range of applications, including:
- Tour guide systems
- Conference interpretation
- Wireless teaching
- Simultaneous interpretation

Image: A collage depicting the TT117 system in use across different scenarios, such as wireless teaching, conference settings, and simultaneous interpretation events.
7. Maintenance
7.1. Battery Care
The system uses replaceable AA batteries. To prolong battery life, turn off units when not in use. Remove batteries if the system will not be used for an extended period to prevent leakage.
7.2. Cleaning
Wipe units with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
8. Troubleshooting
- No Audio: Ensure both transmitter and receivers are powered on. Verify that all units are set to the same channel. Check battery levels. Ensure microphone and earphones are properly connected.
- Interference: Change to a different channel if experiencing interference. Ensure units are within the specified transmission range.
- Short Battery Life: Replace batteries with fresh ones. Ensure units are turned off when not in use.
9. Specifications
| Feature | Specification |
|---|---|
| Model Number | TT117 |
| Brand | Retekess |
| Number of Channels | 17 |
| Transmission Distance | Up to 80m / 262ft |
| Power Source | 2 AA batteries (not included) |
| Audio Input | AUX, Microphone |
| Connectivity Technology | USB (for charging/powering, not data) |
| Item Weight | 8.84 pounds (total package) |
| Product Dimensions | 15.08 x 7.28 x 16.34 inches (package) |
10. Warranty and Support
Retekess products typically come with a three-year service period. For warranty claims, technical support, or any inquiries regarding your TT117 system, please contact Retekess customer service or the seller directly.
11. Product Video
Watch this video for a visual guide on the functions of the Retekess TT117 Tour Guide System:
Video: A detailed overview of the features and functionalities of the Retekess TT117 FM Tour Guide System.





