Public address systems for commercial use, and not for use in automobiles

Digital audio players, audio receivers, power amplifiers, mixing amplifiers, microphones. headphones, earphones, public address acoustic systems and loud speakers for indoor and outdoor use, including that for automotive, home, stage performance, marine and handheld portable environments; time clocks; alarms, namely, burglar alarms, fire alarms, smoke alarms; mobile phone battery chargers, batteries; power inverters, power transformers; tracking devices, namely, GPS tracking devices; transmit...

computer service that creates, collects, categorizes, stores, retrieves, and sends digital audio files to others

Public address systems