My mains adapter is a Ktec, 6.0v 2.0a.
I was told that my meter was worth £300 which is why they assign them to us instead of sell them, so much for that
Still it might not work after it reaches it's re-calibration date, which would have been back in 06 like the ebay advert says. The advert also says it's not tested, if the meter is not tested against a know signal source then you can’t work out what the real levels it’s showing are.