1、 Product Overview 
This tour guide is a portable device designed specifically to enhance the tour experience, widely used in tourist guides, corporate exhibition halls, museums, school teaching, and other scenarios. It achieves clear voice transmission between the presenter and the audience through advanced wireless transmission technology, allowing the audience to easily listen to the lecture content even in noisy environments, effectively solving the problems of limited sound propagation and unclear listening in traditional lecture methods. 
2、 Appearance design 
（1） Overall design 
The presenter is divided into two parts: the transmitter (used by the presenter) and the receiver (used by the audience). The overall design is simple and stylish, with smooth lines that conform to ergonomic principles and provide a comfortable grip. The transmitter and receiver are compact in size, making them easy to carry and operate. 
（2） Material selection 
The shell is made of high-quality ABS engineering plastic, which has good wear resistance, drop resistance, and corrosion resistance, and can effectively protect internal components. The surface has been finely sandblasted, which not only feels comfortable to the touch, but also prevents fingerprints and stains from remaining. 
（3） Color and Identification 
Provide multiple color options to meet the personalized needs of different users. Clear product identification and operation instructions are printed on the surface of the equipment, making it easy for users to quickly identify and use. 
（4） Wearing method 
The receiver is equipped with comfortable earplugs and adjustable hanging ropes, allowing users to choose the appropriate wearing method according to their needs, ensuring that they will not feel uncomfortable even after wearing for a long time. The transmitter is designed with a portable clip that can be easily clipped onto the instructor's clothing. 
3、 Technical parameters 
（1） Wireless transmission technology 
Adopting specific wireless transmission technologies such as 2.4G wireless technology, Bluetooth 5.0, etc., it has the characteristics of long transmission distance, strong anti-interference ability, and stable signal. In open environments, the transmission distance can reach [X] meters, which can meet the usage needs of most scenarios. 
（2） Audio parameters 
Sampling rate: [X] kHz, ensuring high-precision acquisition and restoration of audio signals. 
Signal to noise ratio: ≥ [X] dB, effectively reducing background noise and providing clear and pure audio output. 
Distortion: ≤ [X]%, ensuring the fidelity of audio playback. 
（3） Battery performance 
Battery capacity: Both the transmitter and receiver are equipped with large capacity lithium batteries, with the transmitter battery having a capacity of [X] mAh and the receiver battery having a capacity of [X] mAh. 
Battery life: After a full charge, the transmitter can work continuously for more than X hours, and the receiver can work continuously for more than X hours, meeting the needs of long-term explanation. 
Charging time: It takes about X hours to fully charge and supports fast charging technology, making it convenient for users to replenish their battery in a timely manner. 
4、 Functional Features 
（1） One click frequency matching 
The transmitter and receiver adopt one key frequency matching technology, which is easy and convenient to operate. Simply press the frequency matching button, and the device will automatically complete frequency matching without the need for complex setup processes, greatly improving usage efficiency. 
（2） Multi channel selection 
Providing multiple channels for users to choose from can effectively avoid signal interference between different presentation teams. Users can flexibly switch channels according to actual scene needs to ensure smooth explanation. 
（3） Clear voice 
Equipped with a high-sensitivity microphone and high-quality speakers, it can effectively capture the voice of the guide and play it clearly and loudly to the audience. At the same time, the device has noise reduction function, which can automatically filter environmental noise, allowing listeners to hear the lecture content clearly even in noisy environments. 
（4） Multiple recipients 
A transmitter can connect multiple receivers simultaneously, meeting the needs of large team presentations. The number of receivers can be expanded according to actual needs, and up to [X] receivers can be used simultaneously. 
（5） Low battery warning 
When the device's battery level drops below a certain value, it will automatically emit a low battery warning sound to remind users to charge in a timely manner and avoid affecting the explanation work due to insufficient battery. 
（6） Mute function 
The transmitter is equipped with a mute button. When the guide needs to temporarily stop the explanation, they can turn on the mute function with one click to avoid unnecessary noise interference. 
5、 Usage method 
（1） Transmitter operation 
Turn on the power switch of the transmitter, and the indicator light will turn on. 
Press the frequency matching button and wait for the receiver to complete the frequency matching. 
Start explaining, bring the microphone close to your mouth to ensure clear sound transmission. 
If you need to pause the explanation, you can press the mute button; To end the explanation, turn off the transmitter power switch. 
（2） Receiver operation 
Turn on the power switch of the receiver, and the indicator light will turn on. 
Ensure that the receiver and transmitter are on the same channel, which can be adjusted through the channel switch button. 
Put earplugs in your ears and adjust the volume to listen to the explanation. 
After listening to the explanation, turn off the power switch of the receiver. 
6、 Application scenarios 
（1） Travel Guide 
In tourist attractions, tour guides use transmitters to explain, while tourists wear receivers to listen. Even in crowded and noisy environments, tourists can clearly hear the tour guide's explanation, enhancing their travel experience. 
（2） Enterprise Exhibition Hall 
Enterprises can use tour guides to introduce their products, corporate culture, and other content to visiting customers, enabling them to have a deeper understanding of the company and enhancing their awareness and trust in it. 
（3） Museum 
Museum guides use guides to explain the historical stories and cultural connotations behind cultural relics to visitors, allowing them to better appreciate the exhibits and increase their knowledge in a quiet environment. 
（4） School teaching 
Teachers can use interpreters for classroom teaching, especially in large classrooms or outdoor teaching activities, to ensure that every student can hear the teaching content clearly and improve teaching effectiveness. 
7、 Maintenance and upkeep 
（1） Cleaning 
Regularly use a soft dry cloth to wipe the surface of the equipment and keep it clean. Avoid using cleaning agents containing corrosive components to prevent damage to the equipment casing. 
（2） Storage 
When not in use, the equipment should be stored in a dry and ventilated place, avoiding direct sunlight and high temperature environments. At the same time, the transmitter and receiver should be stored separately to avoid squeezing each other. 
（3） Battery maintenance 
When the device is not used for a long time, the battery should be charged and discharged at regular intervals to maintain its activity. Avoid excessive discharge and charging to extend the battery's lifespan. 
8、 After sales service 
（1） Warranty Policy 
We provide a [X] year free warranty service. During the warranty period, if there are any malfunctions caused by product quality issues, we will repair or replace the equipment for the user free of charge. 
（2） Technical support 
We have a professional technical support team to provide users with 24/7 technical consulting services. Users can contact our technical support personnel at any time if they encounter any problems during use, and we will provide timely solutions for users. 
（3） Accessories supply 
We provide a complete supply of accessories, including earplugs, lanyards, chargers, etc. Users can purchase and replace them at any time according to their needs. 
This presenter brings users a brand new presentation experience with its excellent performance, convenient operation, and wide range of application scenarios. We will continue to strive to provide users with higher quality products and services.