computer programs for performing calculator functions

Battery chargers; Computer keyboards; Computer mouse; Converters for electric plugs; Covers for smartphones; Data processing apparatus; Headphones; Monopods used to take photographs by positioning a smartphone or camera beyond the normal range of the arm; Rechargeable electric batteries; Remote control telemetering machines and apparatus; Smartglasses; Stands adapted for mobile phones; Telemeters; Communications headsets for use with communication radios, intercom systems, or other communicat...