Ultrasonic mouse

An ultrasonic mouse, comprising:

• an ultrasonic module, wherein the ultrasonic module comprises an ultrasonic emitting element and a plurality of ultrasonic receiving elements, the ultrasonic receiving elements and the ultrasonic emitting element are arranged in a matrix, the ultrasonic receiving elements surrounds the ultrasonic emitting element, the ultrasonic emitting element generates an ultrasonic signal, and when the ultrasonic mouse moves, at least one of the ultrasonic receiving elements generates sensing information upon receiving an ultrasonic reflected signal generated by reflection of the ultrasonic signal;
• a processing unit, wherein the processing unit is electrically connected to the ultrasonic module, receives the sensing information, and calculates and generates a movement signal;
• a transmission interface, wherein the transmission interface is electrically connected to the processing unit, and transmits the movement signal out;
• and
• a casing comprising a slot, wherein the ultrasonic module, the processing unit, and the transmission interface are in the casing, and the ultrasonic module is exposed from the slot.