16Keys 4 x 4Matrix External Expansion Keyboard Contral Board

16Keys 4 x 4Matrix External Expansion Keyboard Contral BoardFeature Maximum circuit rating 35V DC 100mAInsulation resistance 100MDielectric withstand 250VRms 50 60Hz 1 minContact 5msLife expectancy 1 million closuresOperating temperature 0 70°COperating humidity 40°C 90 95 Connector type 8 pinMount type adhesivePackage included 1 x16Keys 4 x 4Matrix External Expansion Keyboard Contral Board