Outdoor HD960P Wireless WiFi Doorbell Camera Smartphone CCTV Security Surveillance 2 Way Audio Night Vision Motion Detect Lifetime Cloud Storage Service With No Monthly Fee Works Alexa 2 Pack Totally Wire Free Stand Alone Rechargeable Security Camera No othe device required.Remotely lets you see, hear and speak to visitors who ring the doorbell from your phone, tablet any time and any where Lifetime Free Cloud storage. Cloud storage stores visitor's footage for last 30 days. Includes 3A(18650) battery that can last 3 to 6 months at one charge. Works with Alexa to launch real-time video with your voice. Sends alerts instantly to you phone when visitors press the Doorbell Very easy to install on any surface. It comes with double sided tape and mounting screw. The housing is built to withstand various harsh weather conditions (IP55 rated dustproof and waterproof rating; works between -13 F to 131 F;)