A transfer plug for a variety of sockets includes an insulating shell, a first and a second connectors and a signal plug. The mobile wireless communications device may further include a processor coupled with the NFC device and capable of detecting a field change via the NFC device when the NFC device is in the second NFC mode, determining a condition of the mobile communications device, and switching the NFC device from the second NFC mode to the first NFC mode based upon the field change and the condition. With this configuration, the chip area can be decreased as an increase of layout pitch of the memory cells dependent on the driver transistor size is prevented, and operational reliability can also be improved as a local increase of the current density on the write digit line is avoided. An amount of light on a screen is calculated from the image luminance signal level. More particularly, the method, device, kit and automated system involve combinations of leukocyte filters attached to oligo-immobilized multi-well plates.