A highly durable elastic crawler with a tensile cord having both ends thereof overlapped mutually in a crawler body thus being circumferentially wound around the crawler is provided. The carrier has a recess for receiving and mounting the fingerprint sensor and one or more tactile elements for assisting the user in positioning a finger, and in correctly moving the finger across the sensor being read. When the connector and the corresponding mating connector are connected and interlocked, this causes hooks integrally arranged on the metal locking levers to be levered out of opening arranged on the mating connector such that the locking device is released. The DMA controller is equipped with a format converter converting the fixed-point type of digital data to a floating-point type of digital data. A speakerphone mic captures room audio. The backside surface having a skew less than about 0.