... 4.Fast delivery 5.Competitive price The main index:1.Material: environmental protection silica gel2.The international protection agreement: IP67, IP68.3.Ultrasonic welding ... (125 KHz) high frequency chip (13.56 MHz) encapsulates the watch.(5) The chip: EM4200, EM4305, TK4100, T5557, Mifare1 S50, Mifare1 ... x 9 cm x 6cm, 200 pieces/ box, optional a protection bag per card. Gross weight: 1.2 kg /box (0 ...