Wall-Mount PIR Motion Detector with 80dB Alarm Siren (7~10 Meter/110 Degrees)

Pros: Really worth to the cost. Its just below 8 US$.
The Motion Detection is extremely fine. It get few seconds to get the snapshot of the environment and then it is working perfectly.
Very Fast shipping. I got it within 1 week (To Sri Lanka)

Cons: No Sensitivity Adjustment can be done.
The manual is in chinese language
There is no reset button. You will need to turn it off and then turn it back on after few seconds.
Not specified well.

Other: A should buy product.. :)

Pros: -cheap. 2 times cheaper than useless magnetic alarms. -works without problem -not complicated (aka no intelligence needed for setup) -does what it say. no more no less. -small and hard to see

Cons: -not so loud. -turn on-off button is not good placed. it takes a while to turn the alarm of.

Other: for this price, very good piece of equipment. I'll be using this just to panic any tresspasser and hope that day will run away.

Pros: Really great product. Very cheap and 100% functional. It has a great sensitivity, neither too low nor too high. You can use it for many purposes, for example to trigger another device or camera. See my Mod This topic below for details.

Cons: Maybe one, the red LEDs installed are very weak, I suspect it's wrong resistor or some other circuit fault. Not a problem anyway!

Other: Worth every cent spent on it! Very cheap with good quality sensor and commonly used and well-documented logic chip. Perfect for DIY motion sensing devices.

Pros: The detection works well from 0mm to 4 meters (haven't tested greater distances) and it even works in full dark (I tested)(it detects heat).

Cons: If you turn it off when it is ringing (it will stop the ringing) but if you turn it back on, it rings again. You must wait 10-15 seconds.

Other: It is good. It works. Not expensive at all.

Pros: Everything's wonderful, really, no fuzz. Easy to use, easy to mod. The device works perfectly. The inner schematic is pretty easy understandable and well printed/built. And the siren is really loud.

Cons: The only one con is that some plastic elements are having not so well quality as I've expected. But this is not even really a con for me.

Other: Yes, definitely this is a-must-have device for its price.

Pros: It works. Walk nearby and it blasts away with the siren.

Cons: Eats batteries. Best to connect a small AC adaptor.

Other: Get it, use it, laugh over the instructions, enjoy.