Scanning system using ring scanner and terminal device

A method of scanning an item by using a scanning system, wherein the scanning system comprising:

• a scanner device comprising:
• a housing configured to attach to an index finger of a user;
• a plurality of buttons located on the housing and actuated by a thumb of the user;
• a scanner that reads a barcode;
• a first controller configured to, in response to the actuation of at least one of the plurality of buttons, activate the scanner, and generate an instruction indicating which of the plurality of buttons was actuated;
• and
• a first communication interface configured to transmit the instruction to a terminal device, and
• the terminal device, separate from the scanner device but communicatively connected to the scanner device, comprising:
• a display configured to display a user interface;
• a second communication interface configured to receive the instruction from the scanner device;
• and
• a second controller configured to determine a quantity of an item corresponding to the barcode based on which of the plurality of buttons was actuated, and increment a count for the item by the quantity.