pick from the following.
i. Remote mounted radar devices generally all operate at 300 feet (97.7 m) for approximately 24 hours. There are military-grade radar devices that are licensed to operate night.
ii. Always have your radar detector on board with you at all times. If you have a remote mounted detector detector, then keep it at all times.
iii. Ensure that the radar unit will not transmit sound. If the radar unit does transmit sound, it is generally electromagnetic.
iv. This unit is also not visible to thieves. Remote mounted radar detectors should always be installed by a professional as the unit will need to be placed inside the dash.Choose from options above and answer: What most naturally follows?

How to have a radar detector installed
Consider a remote mounted detector.
Remote mounted radar detectors are typically more expensive than the traditional units that are mounted on dashboards. These radar detectors are more difficult to detect if you're in a place where they are illegal as the detector unit is usually mounted inside the dashboard.
Answer:
iv.