Beware of dead batteries!
These were great little gifts!  They are stretchy and really comfy to wear.  I ordered two, but one came with dead batteries (they take two 2016 batteries).  I have contacted the seller and hope they will make this right.  The info inside the product says to contact glovelite.com directly, but it turns out that seems to be a bogus site with no contact information.  I'll update to more stars when seller makes this right......
Rating: 3 stars