The cameras and the NVR require the power connection. They are not Battery Cameras. WiFi security cameras mean the cameras connect wirelessly to a NVR. WiFi security cameras are designed for continuous recording, which requires them to be. 3MP Supper HD Clarity. Get a clearer vision with 3.0MP resolution. Three Night Vision Modes. Black & White Mode by Default. Switch to Full Color Night Vision by human movement. Black & White Night Vision. Auto Pair, True Plug & Play, Remote Access in Minutes. Download Free ZOSI Smart App on Smartphone or AVSS on PC. Enjoy Live View from Smartphone, Tablet or PC. Advanced Mesh WiFi System. Up to 3000ft WiFi range in open areas. Boast cascading and anti-interference algorithm, it provides higher performance for long distance and reliable WiFi connection. High penetration through walls and other obstacles. Note: Only support 2.4 GHz WiFi. 2-Way Audio & Remote Live View. Hear and Talk back just with touch. Install Anywhere & Share with your Family. Smart Light and Sound Warning. Red-Yellow-Blue strobe light plus brilliant spotlights & siren wam off potential criminal. As your guard in every night, this cam is alert and ready to react to any potential danger via smart light and sound alarm system – triggered by human motion events or controlled manually – to keep troubles away. Advanced H265+ & AVBR Video Format. Save storage space with the latest H. Smart AI Human Detection. Upgraded human detection will trigger alerts (emails, App push notifications and buzzer) instantly when human is spotted in your motion zone to let you know someone is approaching your home, effectively avoiding “false positives” caused by pets, cars or leaves. A sliding cover design make it easy to slot the hard drive into your NVR. Note:This NVR comes with a 1TB hard drive. Support 24/7 Audio & Video Recording. Support full-time audio & video recording, don’t let you miss every moment. And has IP66 waterproof, suitable for installation in any place.