Use coupon code "ONEFREE" to get a free second Simplicam when you pay full price for the first at $99. Shipping fees apply.
They have a 60-day return policy that covers return shipping too, so it is pretty generous. Also, you need the base security system to view the video feed. Obviously, you need a working wifi.
Cameras do have motion sensors. I initially went in to buy two motion sensors for $60 to add to my system, figured paying extra $40 would worth the upgrade.