-[Wiring-Free Installation]This wireless video doorbell is quick and easy to install, eliminating the hassle of wiring. -[Long Battery Life]Built-in rechargeable lithium battery provides 10-12 months of standby time. -[Voice Intercom]Supports voice intercom. When a visitor presses the doorbell button, you can make a voice call via your phone. -[App Remote Control]If you're not home and someone rings the doorbell, you'll receive a video call (must be in the app interface) and a smartphone notification, regardless of your location. -[Cloud Storage]With viewing angle, when a visitor presses the video doorbell, the doorbell activates, and the app captures their movements and saves them to cloud storage. --[Indoor Ring] When a visitor presses the doorbell, a clear indoor ring tone rings throughout the house. Name: Smart Doorbell Application: Smart Living (Tuya) Mounting Method: Drill or stick Power Supply: Outdoor doorbell charges, indoor receiver plugs into a USB port Lens: , 80-degree angle, night vision infrared illumination Battery: Standard 4000mAh, 18650x2 with temperature control protection, approximately 10-12 months of continuous use Power Input: 5V-2A Recording Resolution: 640x480 Storage Function: Cloud storage, permanently free Voice System: Two-way intercom/remote mobile phone prompts Recording Range: 5m Wireless Connection: WIFI IEEE802.11b/g/n 2.4GHz, RF 433MHz System Support: Android 4.3 or iOS 9.0 and above USB Interface: TP-C / DC5V-1A Color: As Shown Material: plastic Package Contents: 1 * Outdoor Smart Doorbell 1 * Indoor Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.