Computers; underwater dive computers; wearable computer hardware; mobile telephones; wireless communication devices for the transmission of voice, data, images, audio, video, and multimedia content; wearable digital electronic devices in the nature of smart watches capable of providing access to the internet, for sending, receiving and storing of telephone calls, electronic mail, and other digital data; smart watches; wearable activity trackers; downloadable computer software for setting up, configuring, operating or controlling mobile devices, wearable devices, computers, computer peripherals, and audio players; recorded computer software for setting up, configuring, operating or controlling mobile devices, wearable devices, computers, computer peripherals, and audio players; peripheral devices for smart watches; accelerometers; altimeters; distance measuring apparatus; distance recording apparatus; pedometer; pressure measuring apparatus; sound recording and reproducing apparatus; radio transmitters and receivers; global positioning systems (GPS devices); electronic navigational instruments; battery chargers and electronic docking stations; life saving apparatus in the nature of a smart watch with automatic crash and fall detection and ability to call emergency services autonomously; acoustic alarms; alarm sensors