Voltmeters; Webcams; Abdominal belts containing built-in speakers for purposes of transmitting music/sounds/educational material to a fetus and built-in pockets in which to carry audio transmitters; Access control and alarm monitoring systems; Baby monitors; Camera flashes; Digital photo frames; Multi-function electronic device for use in children's rooms comprising a sound producing function, temperature gauge and also including a clock and nightlight; Wireless chargers; Wireless speakers