This Wi-Fi video doorbell with ringer allows you to answer the door when you’re not even home! This wifi video doorbell allows you to monitor who and what arrives at your door through the use of your phone using the Tuya Smart Life app. Not only will this help prevent thieves and unwanted visitors but it will give you peace of mind while you're out running errands or at work. It can even trigger notifications to be sent to your phone when motion is detected out the front of your property. Powered by internal lithium battery and can be recharged for up to 6 months use. It includes indoor ringer unit so you can hear the door without the need for your phone! Please Note: Operates on 2.4GHz only. Please Note: The indoor ringer unit requires a USB power supply (see M 8861A listed as an accessory below) Package Includes: Outdoor camera unit. Indoor chime ringer unit. 18650 lithium batteries for outdoor camera unit x 2. Micro USB cable. Wall plugs x 4 Mounting screws x 4. Allen key App user manual Image Sensor: 720P COMS sensor 1/4“GC1054 or 1080P COMS sensor 1/4“ GC2063 Field of View Angle: 160 degrees horizontal 1080P 2 MegaPixels CMOS Sensor, H.264, CMOS: Support auto white balance, gain control, backlight compensation Built-in IR-CUT automatic switch, 850mm infrared, effective distance 5m Support PIR detection and wake up; Passive human infrared detection 38dB Microphone / Built-in speaker, Two-way talk with noise cancellation Night vision: 9 IR LED lights ( Range: 5-10m ). Support wireless network (Wi-Fi/ 802.11/b/g/n ). Power: Outdoor - 2pcs 18650 battery (included). Indoor - USB power supply (optional) Works with Alexa Echo and Google home Outdoor Camera Dimensions: 163H x 75W x 37Dmm Indoor Chime Unit Dimensions: 59H x 59W x 20Dmm