A contactless power transmitting device is provided with: a primary coil that can be magnetically coupled with a secondary coil of a contactless power receiving device; a first temperature sensor that detects the ambient temperature of the primary coil; a second temperature sensor that detects the temperature at a different location to the first temperature sensor; and a control unit. Applying alternating current to the electrical conductor may generate resistively heat the electrical conductor. An efficient incandescent lamp is enabled thereby. The flash may then be controlled as a function of the lux setting for subsequent image acquisition. The frame also includes a pin extending through the first, second and third apertures, such that the pin extends through the interior space and is adapted to slide within the apertures between an extended position and a retracted position, and a spring member biasing the pin towards the extended position. The controller device can query the user to indicate whether a detected activity level of the user represents an actual change in the activity level of the user.