Accumulators, electric; Answering machines; Battery chargers for use with telephones; Cases for smartphones; Cell phone straps; Conductors, electric; Covers for smartphones; Hands-free kits for phones; Megaphones; Music headphones; Optical lenses; Protective cases for smartphones; Protective films adapted for smartphones; Resistances, electric; Rheostats; Telephone receivers; Telephone transmitters; Touch screens; Touchscreen sensors