The emergency stop sign is used to indicate the location of the emergency stop in the tunnel. Adopt electro-optic sign, internal lighting mode, double-sided or single-sided display. Aluminum frame material, dustproof, waterproof, antirust design, sealing IP65. The light source is led or incandescent lamp, and the box size can be customized according to the different needs of customers. Exquisite appearance, firm structure and uniform color.