I purchased two as a trial attempt of setting up my own security system. The app was easy download on iPhone, the camera link up process is very easy and straight forward for a non tech savy person. I now have five total. All work amazing. Customer service via email has been good to guide me when I had questions about one going off line. I have had my first two for a 28 days and they are still at 92%. You have the option to set the detection sensitivity- low medium or high. The higher the easier it picks up movement including a bee or spiders. You have the option to alert passers by with an audible alarm (siren) or with flashing lights, you can speak two way thru the app to whomever is setting it off. You can even set the amount of time the siren or alarm goes off. The alarm sound level can also be set to the loudness you want. The battery life is reallly good on mine and the app notifies me within 3-5 seconds of it sending motion. They company offers a free solar panel or a free camera if you purchase one, you request that complimentary gift via email. I use mine as battery only but the company and Amazon both sell solar panels if you opt for that. My only issue and I mean ONLY is the app notifies me great but the sound of the notification is not as loud as I wish it were and I have my phone on the highest setting ring tone wise. All other notifications I receive when volume is up at its highest, I would rank 10/10. The app has no way to change the sound level of your notification. I give the cameras 10/10- all five of them. I give the app 9/10, only because there is a 3-5 second delay sometimes. The volume of the notification not being able to be adjusted bothers me- I’d give that aspect 7/10. But overall these are a great value, great ease in setup and viewing, great customer service, my only recommendation is make the app have the option to raise the notification level higher where it’s more audible like a text tone is. It can be heard- but not as loudly as a text tone, which actually wakes me up.