1. The device is delivered without power supply! 2. operated on one PSU will hear a very, very annoying hum. 3. With battery, the device does NOT EVEN! I am very disappointed. Anyway, from Hama. What a waste! How can such a thing to sell? I need it perhaps not specially to say, not for nothing that one is interested in such a product, but leave it alone! I have used a new battery, and I tried to get over settings on the system humming away. No Chance. What this device is ausgiebt not to listen; is an impertinence!
