my friend had a LM-1 and he had to send it back 2 times to gewt it "fixed". i think the LM-1s are not the best choice and thier tech support is lacking. i have a wego3 and for the 430 bucks it comes with everything.
a data logger that goes to .1sec to 2 sec for about 7 min to 2 hours of recording.
it has a live display built in with out paying extra.
it has a spare 0 to 5vdc input for a extra input to watch.
and it is the size of a credit card.
they answered e mails on saturday and sunday when i asked scaling the 0 to 5vdc input.

he sold the lm-1 on ebay and got a wego3. no looking back at that big black brick.

good luck with the LM-1. i know they must work but i know some that had bad luck with them.