... 3.life: more than 500 million times Membrane switch Specifications/Special Features:Material: matte PC (smooth), ... Tactile EffectEmbossing with Tactile EffectEmbossing with Metal DomeMembrane Switch with FPC Performance indicators: 1. Electronic characteristics ... C- +80 C, Storage temperature: -40 C - +85 CHumidity: 40C , 90% -95%, 240 hours Shenzhen Lunfeng Nameplate Co., ltd. provide membrane switch ...