Acoustic membranes; Alarm installations and alarms; Cases especially made for photographic apparatus and instruments; Cases for smartphones; Earphones and headphones; Electric contacts; Electric and electronic video surveillance installations; Electrical plugs and sockets; Loudspeaker cabinets; Microphones; Photographic cameras; Radios; Telecommunications and data networking hardware, namely, devices for transporting and aggregating voice, data, and video communications across multiple networ...