It could be operated by a remote control using ultrasound signals, which sparked the idea of remote control for lights and appliances.
Which gave the idea of remote control for lights and appliances. It could be operated by a remote control using ultrasound signals.
It could be operated by a remote control using ultrasound signals. Which gave the idea of remote control for lights and appliances.
It could be operated by a remote control using ultrasound signals. Which gave the idea of remote control for lights and appliances.