【ZOSI ZG2258A 4K PoE Security Camera】This PoE camera is an add-on camera. It cannot be used separately. It needs to connect the Ethernet cable and NVR to work. Only compatible with ZOSI 4K PoE NVR(Model: ZR08DN,ZR08SN,ZR16SK,ZR16DK). Each camera comes with a network cable for connection. | 【4K Ultra High Definition and Night Vision】The resolution of this PoE IP camera is 1.6X clearer than 5MP and 4X clearer than 1080P. Record everything with sharper details. Equipped with 4pcs IR LEDs and 2pcs spotlights, support 100ft starlight night vision. | 【Powered optional and easy installation】 This 4k IP camera can be powered up by a Power supply, also it could be powered up by one Ethernet cable with a PoE switch, easy plug-and-play, only one Ethernet cable to run for both power & video transmission. | 【Human Vehicle Detection with smart alerts】 When there are motion events, this camera will alert to any potential danger via a smart light and sound alarm system. And you'll always receive real-time app pushes and email alerts, providing a higher level of security. | 【IP66 Weatherproof and 2-Way Audio】Aluminum Metal vandal proof & IP66 Waterproof can withstand the toughest of outdoor conditions. This Bullet Camera support 2-Way Communication, not only hear but also can talk back.