What proof looks like
A unit placed after heat, steam or bait keeps counting through the weeks that follow. Zero over the hatching window and a full feeding cycle is evidence of a finished job. A count on night three is a callback you caught before the client did.
Selling it per job
Because the lure lasts a year and the unit needs no visits, it costs little to leave one behind. Priced per treatment, it becomes part of the job rather than part of the site contract, and the client keeps the contractor who can show the file.
What the client sees
A read-only console login: the room, the count, the date. Nothing to interpret and nothing to dispute.