Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not OK

The description for the Sony ICF-S10MK2 Pocket AM/FM Radio made me think it would be a good back-up to the little Sony SRF-37W pocket radio (that works only with phones) that I've been using so well for many, many years. But when the ICF-S10MK2 arrived and I turned it on, I quickly discovered that its headphone jack sent a sound signal only into one ear of my Sony MDR-E818LP Fontopia Ear-Bud Headphones that work fine with many other devices.Of course, there was no mention in the ad that this would happen, so it's my fault for not guessing that, but most mono systems I've ever used at least put that single sound in both ears. The mono isn't the problem, it's that I don't hear that in both ears. But this radio doesn't, so it's virtually unusable since most of the time I listen to NPR shows, I do that by phone since my ears are old and don't hear well.Watch out what you buy. You might get unpleasant surprises.