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Features: * Lens: This video doorbell is equipped with ultra-high-definition camera lens and wide-angle lens to protect your home safety around the clock. * High definition night vision: Equipped with LED lights, it automatically switches to night vision mode at night, and you can see clearly without lights. * Video call: Built-in two-way microphone, when someone presses the doorbell, it will send a push notification to the mobile phone, and the owner can enter the mobile phone call interface to check the visitor and talk to him anytime, anywhere. * Network connection: Supports 2.4GHz network connection and APP connection. The mobile phone can remotely wake up the device quickly in 1 second, and the work is more stable. * Long battery life: The doorbell has a built-in 1000 mAh rechargeable lithium battery. After fully charged, it can be used continuously for 1 to 3 months without frequent charging. The doorbell is powered by USB and has a long battery life. Tips: The doorbell can be used without a memory card, but the storage history cannot be reviewed, and other functions are not affected. Instructions: Connect to the app, turn on the doorbell-download the app on the phone-open the login app-connect the phone to wifi-add the device in the app. Specification: Lens: Angle 125 degrees, night vision white light fill light Battery: 1000 mAh, permanent battery life 1-3 months Power input: 5V-2A Human body induction: optional Storage function: TF card (maximum support 64G) + cloud storage (without TF card) Voice system: two-way intercom/mobile phone remote prompt viewing Recording range: 5m Wireless connection: WIFI IEEE802.11b/g/n 2.4GHz, rf 433MHZ System support: Android4.3 or ios9.0 or above USB interface: TPC-/DC5V-1A Waterproof grade: IP65 Installation method: equipped with installation accessories, can be punched or glued Power supply method: outdoor doorbell charging, indoor Dingdong machine USB plug-in Doorbell size: 13.5 * 5.2 * 3.5cm Ding Dong doorbell size: 6 * 3.8 * 2cm Packing included:  1 * Doorbell 1 * Dingdong doorbell 1 * Charging cable 1 * English instructions 1 * set of installation accessories Note: 1. Due to manual measurements and slight color variations, please allow 1-3 cm (0.4-1.18 inches) difference to suit different display settings. 2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.