In general, all wireless phones have some weaknesses as emergency devices.

They were often used as emergency protective devices.

It's an ideal emergency device for survival in the case of an untenable situation like this.

So he patented a personal emergency device that mutes the television volume.

If the noise registers above a certain level, the television mute function of the emergency device is activated.

He holds a patent for including a radio receiver in the emergency device the elderly wear.

But the shrill whine of the emergency device had an unexpected benefit.

They were quite helpless, with the lower part of their bodies paralyzed by the exotic alien emergency device.

The life-support rig had a full complement of emergency devices, and she put them all into use.

The pony is an emergency device, and needs to be treated as such.