Function parameter: High strength of dustproof, waterproof, force-against, static-resistant, high temperature -resistant, rust-resistant Panel:High strength imported stainless steel Basic:High strength imported stainless steel or strong Aluminum material Pressed key:Uses the laser etching or chemistry etching, the import color painting Pressed-key life:>2 million. Pressed key Distance:0.45mm Pressed key pressure:3N Operating temperature:-50 C?0 C Use scope: Widely applies to the self-service inquiry machine, lining up machine, the telecommunication printer