30
2023
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08
Precautions for purchasing a mobile phone signal blocker
1. Firstly, confirm the location and area of use of the shielding device;
2. Confirm the type of shielding signal: 2G/3G/4G/5G/2.4G/5.1G/5.8G, etc;
3. Confirm whether there is a signal base station tower or a signal amplifier in the corridor near the use site;
4. Confirm the extension function of the shield: long-term startup and use, unified control switch, timed switch on/off, independent detection of whether the shield is in normal use, and other functions;
5. Confirm whether the purchased shielding device belongs to a legitimate product, do not buy a three no product, purchase shielding devices should see the manufacturer, inquire about the warranty period and after-sales service;
6. Check if there are test reports and radiation effects on the human body when purchasing products;
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