Good afternoon Brandon!
You have a fairly broad and important question regarding security. We will try to answer you as accurately as possible. A variety of types of controlled frequencies can be used to block signals. The same frequencies are often used in hospitals. For example, various pacemakers can interfere with the regular operation of signal-blocking equipment. Silencer manufacturers are constantly working to optimize all processes and ensure the safety of users.
As a rule, such equipment can operate at frequencies up to 175 kHz. At the same time, there are no possible obstacles that could be encountered in this direction. Other exciting models also appeared. They can use frequencies up to 405 MHz, which makes it possible to communicate over long distances without additional equipment.
You can find a large selection of similar types of equipment here. From the characterization, you can comprehend that the equipment blocks frequencies in a provided field. For example, if you need to jam signals nearby, the device will not work.
Many developers understand the possible problems of the operation of pacemakers for patients, so they improve the equipment. For this, particular radio-frequency barriers are used, which are not exposed to various external factors. That is why you should not worry that blockers can adversely affect the operation of this kind equipment.
Many blockers are designed to block a wide range of frequencies, which is specified in the corresponding equipment settings. If the frequencies do not match, then there will be no obstacles. The frequency range is wide enough to work. Pacemakers usually use extremely low commonnesses. You can read here and here all the details. Wireless signals make monitoring the patient's health easy without the risk of losing all vital data.
Jammer developers like us make sure you only use safe and proven jammers. You don't have to spend a lot of time and effort. Therefore, you can be sure of your safety. We hope we can help you and answer all your questions.