I bought this camera because they, unlike other dummies something looks professional and the flashing LED represents an essential feature for a good deception. When the camera arrived, so I put two batteries (rechargeable batteries, because I did not like permanently replace disposable batteries) - the camera is not flashing. Well, maybe it's the battery, not enough power or similar .. A closer look of the Note I noticed the battery compartment "AA 1.5V". Now have the batteries "only" 1.2V, should not really be the reason, but I put disposable batteries with 1.5V. But even here, the LED is not lit up. Unfortunately, the camera had no description (for which also, is actually quite simple commissioning). I suspected a defect, contacted the dealer. This came forward very quickly and secured the delivery of a new camera (the old / broken) I need not return) - very accommodating. The new camera, which arrived a few days later, then the same game: With two types of batteries the LED is not lit up. So I went out and bought brand new batteries. High-performance batteries for digital cameras - if they are suitable for, so you should still bring a simple LED to blink. Far from it, even with these it is not fuktionierte. Again the dealer contacted - two devices with the same "defect", can not be basically. This apologized a thousand times for Unannehmlichkeiuten, but told me only that here probably need special batteries are used: AA (Mignon), 1.5 V, but with the special feature "R6" - most of them have the name "MN1500" , Bought package of eight for EUR 3.50, inserted and lo and behold: The LED blinks! So: If you know which batteries have to be inserted, the camera is a beautiful part. Looks really deceptively real. Installation is also easy because screws and dowels are included and the upper camera part can be removed completely by loosening the locking screw. Thus, the screws can tighten easier when the camera out of the way. A little tip: Cable Atrappe easy insertion through the hole in the center of the bracket - when it is screwed to the wall the bracket presses the cable firmly to the wall so it can not slip out and you think the power comes "out of the house". The only batteries, which I have, after a long search found that function in the camera, have already after one month the service acknowledged - not much when you consider that outside moderate temperatures prevail (summer) and a small LED only a minimum of can consume electricity.