Well. Excellent for its price. At first, I thought it was defective because the lights on the corresponding connections did not light up on the Lan cable tester. Eventually, I discovered that if the battery of the sender is not very good, it cannot provide voltage to the receiver... Be careful when placing the receiver in the case, as it finds the switch of the LED and remains on, consuming the battery inside the case... you should put it upside down... Signal transmission in detection is very good. I have much more expensive generators than this... but it has nothing to envy from the expensive ones. Buy it without fear...