Broke after 2 months, very difficult to return
I purchased this mid-October and it is already broken after 2 months of use. Replacing with a fresh battery did nothing, appears to be an electrical failure.  I have a second unit (purchased directly from the acupuncture retailer) that I've heavily used for over a year and a half with essentially no issues. Amazon will only refund me 2/3's of the purchase price.  I spoke to their representative directly on the phone twice to request a packing slip to return this device and still have not received it.  I will happily delete this review if somebody can help me out with this issue.
Rating: 1 stars