1. Video call: Built-in two-way microphone sends push notifications to your phone when someone rings the doorbell. You can monitor visitors and make calls anytime, anywhere via your phone's call interface. 2. Network connection: Supports 2.4 GHz network connection and the \"Tuya Smart\" app. Your phone can remotely activate the device in 1 second, ensuring more stable operation. 3. Infrared night vision: Built-in high-quality infrared LEDs and a light sensor ensure clear images at night. The device automatically switches from day mode to night mode when the ambient light drops to 2 lux. 4. Lens: This video doorbell has an ultra-high-resolution camera and a 125° wide-angle lens, ensuring your home's 24-hour security. 5. Volume control: This doorbell has a strong and stable signal, is easy to pair, has an effective range of up to 50 meters and adjustable volume and ringtone. 6. Rechargeable battery: The doorbell has a built-in 1000mAh rechargeable lithium battery. A full charge provides 2 to 4 months of continuous use without frequent charging. The doorbell is powered via USB, ensuring long battery life. 7. Storage method: This doorbell supports TF cards and free cloud storage. When a visitor rings the doorbell, you can take a photo of them and save it in the application, allowing you to easily view past photos at any time via the mobile app, making it safer and more reliable. 8. Portable installation: Two installation methods: You can use adhesive tape to attach the doorbell or drill holes for installation, making it quick and easy. Specifications: Type: Smart wireless video doorbell Operating temperature: -10°C to 60°C Viewing angle: 125°C Main processor: Broadcom/BK7252 Power supply: DC5V/2A Power supply: 100-240V, 50-60Hz Battery: Built-in rechargeable lithium battery Battery capacity: 1000mAh Battery life: 2-4 months Night vision type: Infrared night vision Storage function: TF card (maximum support 64GB - not included) + Cloud storage (permanently free) Wi-Fi connection: Supports Wi-Fi IEEE802.11b/g/n (2.4GHz), only RF 433MHz Voice system: Two-way intercom/Remote control via mobile phone Playback system support: Android 4.3 or iOS 9.0 and later APP: Tuya Music type: 20 songs Recording distance: Approximately 5 meters Waterproof rating: IP65 Transmitter dimensions: 12.7*4.4*2.6 cm; Receiver dimensions: 6*3.8*2 cm. Installation steps: 1. First, connect Dingdang's power supply, press the doorbell and check if Dingdang rings. 2. Use your mobile phone to scan the QR code in the user manual, download the APP and then register an account. 3. Turn on the phone's Bluetooth, open the APP, click \"Add device\", click \"Search\" and then \"Auto Add\". The doorbell will appear. Click Pair [Button: Network 2.4G]. It can be used after successful pairing. 5. The doorbell supports TF cards, up to 64GB (excluding memory card), which can be installed under the rubber pad on the back of the doorbell. Note: If the doorbell does not ring after Dingdang is turned on, please pair again. First turn on Dingdang's power supply and connect it to a power outlet. Press the function button on Dingdang and observe that the indicator light flashes. Press the doorbell. When the doorbell rings, it indicates successful pairing. Package list: 1 * Receiver, 1 * Transmitter, 1 * Data cable, 1 * Installation accessories, 1 * User manual