1. Intelligent high-definition voice prompt, when it senses that you are about to open the door, it will sound a prompt sound and light up the colorful breathing lights. 2. It is small and does not take up space, and is suitable for most models. 3. USB charging interface, low power consumption. 4. The distance between the sensor is about 5cm. 5. Parameters: Input voltage: 5V Material: ABS Light response time: 2 minutes Battery capacity: 50mAh
