What more fitting place for a radio device than a wrecked radio room?

This formula represents a physical law that radio devices use.

He wanted to reassure the public that this was the first time he had ever used his spying radio device.

He had invented a new radio device for army planes.

Operation of personal radio device that cause interference to other services may result in prosecution.

I have a very small radio device, which will tell you when to come down from your room to the hangar area.

There are radio devices for every observers and in the vehicles because of the safety.

This is to minimise the risk of interference to other radio devices.

He operated the radio device, hoping it would stand up under the new demand on it.

The plane was controlled by an automatic radio device.