AliExpress is offering a promotion on the Jooan wireless outdoor surveillance camera. The latter can connect via Wifi to your home network, allowing you to access the video stream from your mobile devices.
It is also water resistant according to the IP66 standard, and is not affected by rain or humidity. The camera can detect human silhouettes and thus warn you of an intrusion, and also allows you to communicate with people outside. It has two cameras of 3 megapixels each: one is fixed, and can thus remain focused on the front door for example. The other can rotate 355° horizontally and 90° vertically, to cover all nearby surroundings.