Apparatus for recording, transmission and reproduction of sound and images; audio and video devices, namely, CD, DVD and MP3 players; wired and wireless headphones and earphones; wired and wireless devices used to receive audio content, namely, ear buds; wearable communication devices for ears, namely, ear buds; electronic equipment for measuring and sensing altitude, distance, acceleration rates, and speed, namely, distance measuring apparatus, automatic altitude indicators, laser speed detectors; sensors for determining altitude, speed, acceleration, and distance; GPS navigation devices; wearable communication devices that are a combination of headphones and sensors in the nature of altitude sensors; downloadable software for measuring and sensing altitude, distance, acceleration rates, speed, heart rate, blood sugar levels and medical information; portable digital electronic devices for recording, organizing, transmitting, manipulating, reviewing, and receiving text, data, and digital files, namely, wearable activity trackers, smart phones and smart watches; wearable electronic devices and digital electronic devices that include software for communication of data to personal digital assistants, smart phones, and personal computers through Internet websites and computer and electronic communication networks, namely, wearable activity trackers, smart phones and smart watches; sensors for scientific use to be worn by a human to gather human biometric data, namely, to measure distance not for medical use; downloadable software for sending alerts, messages, emails, and reminders, and for recording, organizing, transmitting, manipulating, reviewing, and receiving text, data, audio, image and digital files and display screens