1. Features: - Ultra - long standby: No need for charging, disassembling, and recycling. It has a built - in large - capacity lithium - ion battery for ultra - long standby. The doorbell is powered by a built - in large battery, eliminating the need for frequent charging. Moreover, the doorbell is powered by USB, which is simple and convenient to use. - Video call: Easily communicate with guests. When the doorbell is pressed, it will send a message to the mobile phone, and the owner can enter the video chat interface on the phone. - Portable installation: It can be pasted or installed with holes. There is a sticky support bracket, so there is no need to drill holes in jeans, and it also supports hole - punching installation. No plug - ins are required, which is convenient and worry - free. - Screenshot: Cloud storage, drip - proof. When a visitor presses the doorbell, the image of the visitor can be captured and the record can be saved in the cloud, so that the mobile app can better view the previous pictures, which is safer and more secure. - Wireless video doorbell camera: Supports 2.4G WiFi and APP connection, with 480P high - definition, providing clearer images and videos and more information. - Two - way audio: Using the built - in microphone, you can see and talk to visitors anytime and anywhere. - ML1T - B night vision: It has built - in high - quality infrared LED lamp beads and a light sensor. The night images are clear. When the ambient light drops to 2 lux, it can automatically switch from the daytime mode to the night mode. The signal is strong and stable, easy to pair, and the transmission range can reach 50 meters. The ringtone and volume can be adjusted according to your preference. 2. Specifications: - Name: Smart doorbell - Material: ABS plastic electronic components - Color: White - Maximum resolution: VGA, 640 x 480 - Video encoding standard: MJEPG - Audio encoding standard: G711.A - Photo frame rate: VGA@20fps - Day - night mode switch: Automatic - Video transmission encryption: AES - RF encoding: EV1527 - Infrared light control: Automatic, with adjustable sensitivity - Infrared light wavelength: 850nm - Motion detection: Automatic, with adjustable sensitivity - Connection method: 2.4G WiFi - Operating temperature: - 10~45℃ - Operating humidity: ≤95% - Doorbell battery capacity: 1000mAh.