For sale is this AMPROBE DM-II Data Logger/Recorder. The unit is in very good to excellent condition. NOTE: The battery compartment, at some point had some rust on the battery terminals. The battery set-up is used for a backup. The battery compartment had been soldered and cleaned. Shouldn't be any problem at this point. I am selling this unit for a neighbor who performed energy audits. Any questions, don't hesitate to ask. I am confident enough to offer free return shipping.