Shenzhen Card Master Electronics Co., Ltd., smart card equipment and system professional manufacturer, founded in 1996, mainly engaged in developing and marketing the automatic identifies technique and intelligence card technique system and equipments 10 years. Please refer to the following pictures in our product line. 1.Mobile Phone Signal Isolator (with remote device) 2.Mobile Phone Signal Isolator 3.Mifare card charging system 4.ID card reader 5.time attendance & access control system 6.Mifare card / ID card 7.Mifare card reader-writer