Barry Fox, W1HFN writes on the PART of Westford mailing list:
The W1HFN fox box will be deployed at the Lime Quarry on Rte 110 [in Chelmsford] today [Wednesday, May 9, 2018]. Frequency is 146.565. There is a 20 second voice message / ID every 3 minutes and a log to sign. The unit is quite small–about the size of a deck of cards.
I will leave it out for a week, at that duty cycle batteries should last.
Good luck to all.