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'