Five Driver Headphones,KZ ZS10 PRO High Fidelity Noise-Isolating Earbuds/Earphones with Microphone (Without MIC, Purple)

how many dbs does it block?

Will they fit small ears?

Do these work with your phone like an iphone 11?

I see some pictures where it looks like the metal plate is put fasting on with torque screws but some look liked they are embossed onto the plate . Wh