Electric signs; Echo sounding devices; Radiation-measuring instruments; Backlit signs; Electronic LED signs; Electronic advertisement boards featuring a neon lamp; LED and HID light controls; Photovoltaic systems that convert sunlight into electric and thermal energy; Neon signs; Anti-intrusion alarms; Electronic displays, namely, digital signage; Protective active cooling vest, active cooling seats, active cooling head cap and active cooling blankets to prevent injury due to overheating; Ele...