Having written the first comment I took another look online and found some stuff about the standard DMM chip used inside this meter and all (I think) of the Unit-T meters.

The only problem I think might be the serial port.  I am not sure yet whether it will work with either a PL2303 or FTDI USB to serial adaptor since the client software needs to raise either CTS or RTS, or both, to power the opto-couplers in the lead.

If Unit-T sell a USB to meter adaptor lead I'd like to know where to get one.

I particularly like the RMS feature, which you mentioned in the show is uncommon in such a cheap meter.

I'm jealous of your ability to add the timeout power modification though.  Could have done that when I could see but not now.

Forever leaving my meters switched on and flattening batteries.