Waterproof Keyfob for Door Access Control : 1 .Printing Printable with silkscreen 2 .EM4100,EM4120, ,TK4100,etc ... Waterproof Proximity Keyfob for Access:Widely used as access control management and electronic purse within banks, medical insurance, government, enterprises ... and education, etc. Parameter Weight : 6g~12g depends on the part Standard Color : Grey, blue, yellow, red, white and purple ...