Upgraded Rechargeable Battery: The parent unit is equipped with a 3500mAh Battery, which can work continuously for 16 hours with the screen-on. And with the power saving mode, it can even support you a whole day (up to 30 hours). This Baby Monitor delivers 100% Privacy and Security Assurance: The baby monitor is transmitted via secured internal 2.4GHz channel with no video latency. And the monitor is plug and play without WiFi and any APP, which is more safe and more stable. Moreover, you can talk to your baby as clearly as if you were in the same room in real-time via two-way Talk feature. Automatic infrared night vision gives you a clear view of the nursery even with the lights out, so you can keep your eyes on your baby all the time.