I’ve been using DropCams at both my business and home and can highly recommend them. They are not suitable for use outside but I have mounted some of mine in windows facing outward and they work great. They will detect both motion and sound and send alerts to your smart phone alerting you that a motion event or sound has been detected.The cameras also have a speaker so you can both send and receive voice/sound. You can subscribe to their cloud video recording service and download and make copies of events. I have their 7 day cloud video recording service and find it perfect for my needs. The viewing software is very intuitive and places markers on a timeline making locating and viewing events very easy. The cameras are VERY easy to set up and use and even work in total darkness with their own IR emitter. I can’t recommend them highly enough. Their customer service is first rate too.
I second that