What do the three buttons on the intercom do

Need to try the model and be sure, but in general there is a monitor key, i.e. it does not automatically turn on the static signal for continuous monitoring when the signal is weak, and some models can be customized with a case function via software. As for the Motorola GP88S I use, the definition of one key is to listen and one key is the power grade.

The walkie-talkie generally consists of an end cap, PTT button, headset and power socket, PCB components, LCD parts, volume/on/off knob, code knob, indicator light, microphone, etc. The PTT button acts as a transmit switch and is usually on the side. The indicator light indicates the operating status and is usually on the top. There is also a volume/on/off knob and a code knob (for channel selection) on the top of the intercom system.

The LCD part directly displays the working status of the intercom system.PCB components are the core of the intercom replication point, the important components are on the PCB, non-professionals are not allowed to disassemble. Most of the intercom due to technical performance and anti-collision characteristics, there are special shielding, aluminum shell (fixed PCB) and so on. Professional machines also require waterproofing and more complex structures.

Extended information:

p>The communication distance and effect of the walkie-talkie is mainly affected by the following factors:

1. The higher the output power of the transmitter, the greater the coverage of the transmitted signal, and the farther the attack communication distance. However, if the transmitting power is too high, it will not only consume electrical energy and affect the service life of amplifier components, but also cause radiation pollution.

2. The higher the reception sensitivity of the communicator, the farther the communication distance.

3. Antenna gain. When the antenna is matched with the machine, the higher the antenna height, the stronger the receiving or transmitting ability.

4. Environmental factors, including roads, tree density, electromagnetic interference in the environment, buildings, weather conditions and terrain differences.