The following lines were added (+) and removed (-):
The MK1800 has a high failure rate. After 10 years our tests show a 66% failure in the radio electronics. The most frequent problem is the automatic squelch circuit failing. The unit becomes sensitive to noise or fails to enter power save mode. Under the most common failure condition the unit will start to make a clicking noise at regular intervals, which is the result of it exiting the power save state an activating the speaker when no real transmission is being received. The MK1800 has a high failure rate. After 10 years our tests show a 66% failure in the radio electronics. The most frequent problem is the automatic squelch circuit failing. The unit becomes sensitive to noise or fails to enter power save mode. Under the most common failure condition the unit will start to make a clicking noise at regular intervals, which is the result of it exiting the power save state and activating the speaker when no real transmission is being received. The brief static sound coming from the speaker sounds like a loud click, and repeats about once every couple seconds.