first , the good part . these be the second set of Jensen headphone I have purchase . they be a very good value compare to some of the other I have try . the downside be that the signal will very slowly drift over the life of the battery , but usually a slight tap of the tuning knob will bring it back . the newer model like this one appear to have better signal aquisition , so this may solve some of the drift problem I see in older model . battery life be pretty good , I usually go through a set every 6-7 day on the old one . -lrb- the old model require 3 aaa 's instead of 2 however -rrb-  now the bad , the production value be rather poor on the electronics in these headphone . my first pair start go rather glitchy on I , sometimes I would have to lightly hit the side to get they to find the signal again , and the battery life start go down drastically . it also would rapidly lose signal when it have this problem . I take they apart and notice that the soldering job be quite substandard , and there be several uninsulated speaker wire that be short out . after put some insulation in on the board , the headphone start work perfectly . I take these apart after I recieve they and notice the same problem . the headphone be also pop loose from its plastic fitting due to substandard glue . both easily fixable if you be good with electronics .