What emf pendant is better?

Interesting. Personally speaking, I would go with number 2. As an RF engineer, I find it hard to believe because these things and NO thing that I know of absorbs emf energies, in contrast certain things do ATTRACT them. It is an interesting notion, because there are talisman that were created ages ago that we KNOW FOR A FACT bind negative spirits. BUT, the symbols must be placed correctly, etc, etc.