Originally purchased these thinking $40 for a cheap camera system I could possibly use to look at my front and back yards and if they aren't great oh well I'm only out $40…plus tax of course and I got free shipping ….but the second i connected my phone to the first one via Bluetooth and the app right off the bat I was shocked at how amazing these bad boys are !!! With video and audio recording capabilities, sd/hd and night time infrared, cloud or sd card memory for recording events , the Ptz zone control to get the exact view or parameter scan you are looking for , I highly recommend this product!!! The app on the computer is even more intuitive and customizable and you can find the manual there any time you need !!! I'm definitely buying this again and will and have shown all my friends this amazing steal of a security system for only $40