... of mobile phones, electronical toys, playstations, mp3, mp4, ect. 4 leg metal dome array:1.Simple structure,good feeling 2.Travel ... :0.18+-0.03mm3.Feel:50%±10%. 4.life cycles:>1millionMembrane metal domeThis type is somehow similar to ... °C, 5±0.1%,48H. MYLAR initial force test:4↑(Unit:No/Ball)MYLAR retention test:8↑(Unit:hr/kg ... .3 ↓(Unit:100°C*40mins)Certify:SGS,RoHS,VOA 4 leg metal dome array