Alarm.com has partnered with SkyBell to create the best doorbell camera on the market today. The ADC-VDB105 (satin nickel) and ADC-VDB106 (bronze) are the Alarm.com versions of the Skybell Trim. These slim line HD video doorbells are excellent for replacing an old doorbell system with minimal space in terms of width beside the doorway. Unlike their round counterpart (ADC-VDB101 & ADC-VDB102) which operate at 1080 the ADC slim doorbell cams can only transmit video at 720P. This is the one concession that was made by Alarm.com on this slimmer version. Just like most video doorbell cameras it requires power (12VDC or 24VAC sold separately) and a 2.4GHz WIFI connection. After paired to your network you can inform your Alarm.com dealer that you are adding the camera and they will ensure you have the proper service package. This doorbell camera is not intended for the SkyBell app and only should be used with the Alarm.com app.