The phrase "as a second device" is correct and usable in written English.
It can be used when referring to an additional device that serves a secondary function or purpose in a given context.
Example: "You can connect your tablet as a second device to enhance your productivity while working."
Alternatives: "as an additional device" or "as a supplementary device".
As a second device demonstration, the integrated ridge resonator is applied to generate high-coherence Brillouin laser action.
Dr. Cooper said that people like him with good upper body strength would most likely not want to trade their manual wheelchairs for the iBOT, even though they would like to have an iBOT as a second device.
Panasonic is marketing the $500 player as a low-priced machine that people can use as a second device, for example in their bed rooms.
He said the team sees this as a second device people use at home, as a complement to their desktop computer or a more powerful laptop.
Therefore, for users to enjoy a great experience, they'll likely have to buy a Samsung smartphone as a second device (this despite Google's announcement that is will launch more VR-ready Daydream phones soon).
I mention it here only because it looks to be, at the very least, a solid if generic printer that could be nice as a second device in your home workshop or design office.
Will the smartphone establish itself as the single device that people carry, or will consumers continue to prefer to tote a second device as well, such as a music or video player?
Such boats are also required, in many cases, to carry a second device, known as a VMS (vessel monitoring system).
The patent documents suggest that the same temporary suspension of the noise-canceling capabilities could also be triggered by an electronic, non-audio signal sent from a second device, such as a doorbell.
Although some design changes have been implemented in this device to make dissection feasible, transection of the coagulated tissue is usually accomplished with a second device, such as scissors [14] or ultrasonic dissector [13].
A second device, described as a pressure-cooker bomb, was found nearby.
