We have a Motorola hubble one and love it, basically the cheapest one with with all the features we wanted. A single camera (with night vision) with 2 way talk, built in lullabys/music, pic/video recording, works on cell phones/wifi with the phone app, but also has it's own video unit that will work on its own a very good distance that we take camping and works like 3 sites over before signal started to even drop out a bit.
Also has temperature/motion/sound alert settings, but never really used those, we were very lucky to have a good sleeper!!
https://www.motorola.com/us/products...p668connect-35
The more expensive ones have higher resolution video and a movable camera, but didn't feel like like extra cost was worth it.
Very impressed with what we got for like $150 bucks. We never watched it compulsively, but so handy to be able to go outside and keep tabs during nap time, but even now that the kid is nearing 2 years old to have a quick look to see if they are getting to sleep on their own at night or sitting up playing with toys and messing around
