Z30 Electronic Wireless Doorbell WiFi Smart Video Doorbell Digital Visual Intercom WIFI Door Bell Doorman Home Security Camera Description: Product model doorbell Main control model bk7252 Sensor model gc0328 Photosensitive support Audio input 1 channel Audio output 1 channel Infrared drive, max. 50mA MicroSD card holder does not support 2 keys: doorbell key and reset key 2 indicators: equipment status indicator and charging indicator Battery interface 1 way Charging power DC 5V Function and technical parameters Parameter description System architecture embedded FreeRTOS Maximum resolution VGA, 640 * 480 Video coding standard mjepg Audio coding standard g711 A Video frame rate VGA@20fps Day night switching mode automatic Video preview supports 1-way P2P Sound acquisition support Video transmission encryption supports AES Dingdong RF code EV1527