Proximity Card: credit card size & thickness, TK4100/EM4100,4102,125KHZ , 64k byte read only, read rang:2-10cm. Product Description:125KHz proximity card is a ... -printed cards.Features:Dimensions: 86 x 54mmThickness: 0.84mm(Clamshell card is 1.8mm)Material: PVC, PET, ABSChip: TK4100/EM4100,4102Surface ... : -20 to +60°CStockage temperature: -20 to +65°C Proximity Card