text: These work OK... but
  
  So we bought two of these things, one right out of the box never worked. The instructions are horrible don't expect any help from what is said in them. The second one has worked pretty well for the time we've had it. But the tube that the led rests on the end of easily pulls out of the body that houses the batteries. Overall these things are cheaply made and junky. Returned the 1st one... we'll see about the second one.