How useful are ear-hook walkie-talkies!

How useful is the ear-hook walkie-talkie! All walks of life need to communicate, so don't use the traditional bulky walkie-talkie anymore, just use this miniature ear-hook walkie-talkie! It has high-definition sound quality, no frequency or station crossover, and it is super small in size, freeing your hands! With a light touch, you can do nationwide intercom, and it's free of charge! You can use it right after you receive the walkie-talkie and turn it on! It can be used in all industries.