Smart doorbell Xiaomi Doorbell 3 - black color one year warranty by Hamilton the official importer Technical specifications: sharp and clear photography even in the dark photography in low light conditions using 4 infrared sensors (940nm) Advanced AI motion detection: The smart doorbell is equipped with a human body detection sensor and an advanced algorithm for detecting the shape of humans; The doorbell monitors abnormal movements in front of the front door, and sends messages to the smartphone as soon as they are detected. Two-way intercom with the option of changing the voice (normal, clown, adult) to maintain privacy. A voice message can be recorded for automatic playback when you press the smart doorbell button. Theft - powerful removal alarm, video recording and sending a message to a smartphone **Simple and quick installation using the "do it yourself" method - no need to invite a professional Wireless connectivity - Wi-Fi IEEE 802.11a/b/g/n 2.4GHz | RF 433MHz input voltage - 5V/2A Operating temperature range: smart doorbell - -10°C ~ 45°C | Internal speaker - 0°C ~ 45°C Operating humidity range - 10%-90% RH (for both devices) Compatibility with systems - Android 4.4 or iOS 9.0 and above Dimensions and weight: smart doorbell - 128 x 60 x 23.5 mm | Internal speaker - 60 x 60 x 39.6 mm In the package: Smart doorbell, fixing base, internal electronic speaker, unlock pin, Type-C charging cable, screws, English warning sticker, user manual and warranty letter Notes: * The product is not waterproof and dustproof and should not be used in an environment exposed to rain and dust ** Even if the doorbell is stolen, it cannot be reset and activated by another Mi account *** The internal speaker requires connection to a standard power adapter that is not included in the kit Warranty: one year warranty by the official importer Hamilton, service and warranty at phone number: 08-6852114 Whatsapp support at phone number: 052-6104399