Works with Alexa for voice control (Alexa device sold separately). Add on camera only base station required. 100 percent wire free and weather resistant: Free of power cords hassles to place your camera where you need it indoor or outdoor (IP65). Rechargeable Batteries: Arlo Pro cameras include rechargeable batteries that support fast charging. The Arlo Pro 2 add-on camera is compatible with both Arlo Pro base station and the original Arlo base station. 2 way audio: Built in mic and speaker enable push to talk capability, so you can listen in and talk back. 7 days of free cloud recordings: Arlo Pro comes with rolling 7 day cloud recordings. Live stream or view recorded video and audio for up to 7 days. Works with Amazon Alexa/Echo Show/Fire TV/Google Assistant: View your live video with a simple voice command. Works with IFTTT, Samsung SmartThings, and more. Arlo Smart adds powerful intelligence to your Arlo cameras. Customize alerts to detect people, specific zones, and contact emergency responders right from your smartphone’s lock screen (optional service, includes 1 month trial). Wireless range: 300+ feet line of sight. Note: Kindly refer user manual and troubleshooting tips provide under technical specification.