"al" wrote in message
...
The following is a quote from a Screwfix catalogue:

"6G 2m high spec surge protection lead, incorporates surge protection for
BT
/ Modem supplied with 1 x BT Male to RJ11 connector and 1 x RJ11 to BT
Female connector. LED confirms protection with audible alert warns when
unit
is not protected. Filters RFI which can interfere with TV / Audio
Equipment."

What does it mean by alerting when it's not protected? Why would it not
be
protected?

when it has exploded - which is what they do