Details：
The telephone casing is made of high-strength stainless steel SUS304 material, and the surface is brushed (painted), which is resistant to abrasion and corrosion. The outer casing has a grounding device and is completely electrically isolated from the internal circuit.

Details：
The shell of the phone is made of high-strength aluminum alloy material, which is stamped out from the die and sprayed on the surface, which is resistant to wear and corrosion. The shell has a grounding device and is completely electrically isolated from the internal circuit, has a certain electromagnetic shielding effect, has dustproof, anti-noise, anti-riot characteristics, and the protection level of the whole machine reaches IP 54;

Details：
The shell of the phone is made of high-strength aluminum alloy material, which is stamped out from the die and sprayed on the surface, which is resistant to wear and corrosion. The shell has a grounding device and is completely electrically isolated from the internal circuit, has a certain electromagnetic shielding effect, has dustproof, anti-noise, anti-riot characteristics, and the protection level of the whole machine reaches IP 54;