Another great product by Ring at another Big price. The device comes with one battery in the box, yet the device can take two. I do recommend getting the second battery, it will (obviously) double the time between recharging the battery. I have mine integrated with a Ring 2 (which uses the same battery type) and a Ring Chime Pro to improve the wifi network. Again don't forget you also have to subscribe to the Ring Cloud services if you want to record the interactions (which I certainly recommend).