This is the second time of ordering these units. The first time I just could not get my head around it and couldn't get to work as intended more NE than the items. Asked for a refund and there was no quibble, excellent service. This time with more knowledge ordered the units plugged in and hey presto working first time so great, very good strength in back of house where there was a dead spot. Now in the process and working up the garden to see how the signal strength is. Overall thoroughly recommend this product (after online research good reviews) and also using Faculty-X was very good value. Cheers..