Yes, this network camera has a built-in microphone.

According to the user manual, it is possible to set a specific time period. Unfortunately there is nothing about push notification, I don't think there is a dedicated app. But it can send an email when an alarm is triggered. Unter folgendem Link findet man noch die Gebrauchsanweisung: https://www.hikvision.com/content/dam/hikvision/products/S000000001/S000000002/S000000011/S000000022/OFR000024/M000045324/User_Manual/UD22754B-B_Network-Speed-Dome_User-Manual_E7,-5.6.10-11,-5.7.0_PDF1-TEST_en-US_20221221.PDF