A lamp holder connector adapted for connecting with a lamp includes a first holder, a second holder, a connecting part, at least two buckling ears, a first terminal assembled in the first holder and a second terminal assembled in the second holder to electrically connect with the first terminal. A public IP address and discrete port number are assigned to the private user device and private IP address and stored in an incoming call table. The fan speed of each fan is adjusted independently to control the air temperature from the fan. , initial threshold value, when damaged by baking. Object feature analysis comprises generating and examining a hypothesis about object features and correcting the concerned object’s features of the same and other levels in response to results of hypothesis examination. A control circuit controls current flow from the supplying circuit to the EL cell such that an amount of current for discriminating between gray scale levels is approximately tens of micro-amps.