I bought the Aosu doorbell to replace an Arlo doorbell after Arlo changed its policy to charge for a monthly subscription in order to access recorded activity. Needless to say, my favorite feature is the ability to view recorded activity without a subscription. Additionally, I appreciate the ability to easily snooze the device to stop alerts and the audio feature to be able to communicate with someone who is at my door. I liked this device so much. I added the solar cam to monitor activity in my driveway. I like the option to receive alerts for either all motion or limited motion such as people only. I recommended these cameras to many people. They are a great quality product at a reasonable cost.