The rechargeable battery cameras charge simply and quickly over USB, and they transmit video back to the NVR wirelessly, making installation easy.2K resolution gives you richer images you can zoom in to capture essential evidence with 50% more pixels than 1080p cameras.Always enjoy the strongest available Wi-Fi connection. SwannNet™ allows you to select whether each camera connects to the internet via the NVR or your internet router.Get color video at night up to 32ft (10m) with the lights on & even longer, up to 100ft (30m), in black & white during total darkness.With Swann's True Detect, warm objects like people & cars can trigger the lights, siren, push notifications & recording with fewer false alarms to worry about.Mount the cameras outdoors as their weatherproof design is IP66 rated, meaning they are built to withstand rain, snow & heat, all year round.This system is designed to protect, & prevent crime at, small businesses & large homes. Position the cameras to watch over entrances, yards, driveways, parking lots, shop floors, and more. | Swann | | Refurbished Excellent | NVW-600CMB 2K Wireless Camera With Removable Battery Weatherproof IP66 | Best Buy