A bolometer infrared detecting element has a thermal isolation structure in which a temperature detector comprising a bolometer thin film is held floating from a circuit substrate by beams. Further, the developing cartridge can include a driving input gear configured to receive an external driving force and apply the received driving force to the developing roller gear. The transfer surface may be a photoconductor with an electrostatic latent image that is written with controlled light or it can be made of a dielectric material and be rigid and conforming to the intended product substrate or flexible and made to conform to the intended product substrate. When the external wireless signal is not sensed by the first sensing unit, the state of the transmittal line matches with the pre-determined state.