LED display can remind the discharge needle of the dirt, wear and tear; cylindrical discharge needle, more advantageous than the traditional discharge needle.

Adopting the AC principle, it eliminates static electricity quickly, has excellent environmental resistance, and is effective for use in ordinary environments.

Adopting the principle of fixed point, high-frequency elimination of static electricity, rapid neutralization of static electricity, excellent resistance to the environment, the effect of ordinary environmental use is also good.