Note : cloud is not free, not support TF card . Features: * Supports active wake-up,You can use it as a Camera, and the owner can directly click the doorbell to view the real-time outdoor situation. *Wire-free via WiFi.Based on 2.4G WiFi, without cable hassles. *Put It Anywhere.100% wire-free means you can install or move it anywhere within the WiFi range. *Rechargeable Battery Pack.800mAH battery with long standby time *Night Vision.With advanced starlight technology 480P cmos sensor, no additional lighting infrastructure is required. *Real-time View Anytime Anywhere.Aiwit App allows you to enjoy the peace of mind that comes from knowing your home is safe and secure,Guests will be able to make video voice calls and take short videos. The owner will not need to open the door to know the information *Encrypted Cloud Storage.Save the recorded videos in encrypted cloud, never lose a file.( Cloud is not free ,Not free) *Two-way Audio.Listen and speak to your visitor in live view. *Ultra Wide-angle lens.With wider view, cover every corner, inside or out. *Low Battery Notification.Notify you when battery level drops to 10% so that you can charge it in time. Specifications: *Alarm push,Push for 5 second. *Sensor performance,Support automatic white balance, automatic gain control, automatic backlighting compensation. *Lens Angle:120°. *work environment,Working temperature: - 10 ~ 50 ℃, humidity is < 95%. *material ABS. Package Included: 1 * Smart doorbell 1 * Chime 1 * Type c usb cable 1 * Manual