Two devices defective

The unit makes a good impression. I tested only the radio and CD player. The first device I have returned. Unfortunately, the second unit was defective. In both devices, it smelled when playing CDs after a relatively short time after plastic or charred. The CD player "jumps" frequently and tried in a variety of CDs.

Who buys the equipment should test his copy so well. I suspect that I have caught a defective batch.