Tablet computers; [ components for electricity mains in the nature of electric wires, connectors, circuit breakers, cables; ] stands adapted for mobile phones; battery chargers; [ electric plugs, sockets and contacts; USB cables for cellphones; ] rechargeable electric batteries; earphones; [ cabinets for loudspeakers; smartwatches; USB flash drives; cash registers; wearable activity trackers; acoustic couplers; ] covers for smartphones [ ; covers for calculators ]