In outdoor adventures or rescue activities such as cycling, the role of walkie-talkies is greater than that of mobile phones in some cases. It does not require external base station support and can communicate freely with teammates in most harsh environments.
Some of them also have three-proof and GPS functions. If a disaster occurs, walkie-talkies can not only send distress signals, but also be used to listen to external information. It is necessary to understand some knowledge of walkie-talkies and reserve a pair of walkie-talkies for backup.
Walkie-talkies and civil walkie-talkies
The English name of walkie-talkies is two-way radio. It is a two-way mobile communication tool. Without any network support, you can talk without incurring phone charges. It is suitable for relatively fixed and frequent occasions.
Civilian walkie-talkies: All walkie-talkies with LCD screens, digital display tubes, and digital buttons on the intercom are civil walkie-talkies. Its frequency range is between 100-500Mhz, which can be shielded by the new signal jammer.
How to use the walkie-talkie:
- When the walkie-talkie is transmitting, keep the walkie-talkie in a vertical position and keep the microphone 2.5-5 cm away from the mouth.
- When transmitting, the walkie-talkie is at least 2.5 cm away from the head or body. If you carry a handheld walkie-talkie on your body, the antenna should be at least 2.5 cm away from the human body when transmitting.
- Do not turn the machine on and off many times during use, and adjust the volume to a volume suitable for your hearing.
The working principle of the walkie-talkie jammer is based on electromagnetic interference. Walkie-talkies usually use fixed radio frequency bands for communication. Common frequency bands are VHF (136-174MHz) and UHF (400-470MHz). The jammer prevents the walkie-talkie from receiving or sending effective radio signals within the set range by emitting strong electromagnetic interference signals in the same frequency bands as these, thereby achieving the shielding effect.
Advantages of Intercom Jammers
| High Efficiency | Intercom jammers can quickly block all intercom signals in a specified area, ensuring that there is no communication interference or information leakage in the area that needs protection. |
| Flexibility | Modern intercom jammers can adjust the shielding range and shielding frequency band according to different needs. Whether it is a small conference room or a large-scale public event venue, it can be flexibly deployed. |
| Wide Applicability | By the end of 2007, the U.S. military had deployed more than 30,000 jammers, significantly reducing the risk of attacks by mobile-controlled IEDs. |
