Swann 460 NVR-460 Wireless 720p 500GB Micro Wi-Fi Network Video Recorder 4 channel NVA-460 Wi-Fi Video NVR with 500GB HDD 4 Channel Wi-Fi Monitoring System / Smartphone Connectivity / Add up to 4 720p Wireless IP Cameras / Record to built in 500GB Hard Drive Unique all-in-one DIY (Do-it-Yourself) security kit combines video alarms is ideal for anyone wanting 24/7 protection Add up to 4 compatible SONVW-460CAM Cameras Set and forget by adding a 2.5” SATA hard drive to record continuously or longer with motion detection Complete peace of mind: motion-activated alarm sensors cameras can trigger push notifications, siren video recording, and be alerted for the perfect mix of deterrence evidence, be alerted if the sensors’ battery life is low Security in the palm of your hand: view live, record video control the alarms on your Smartphone in minutes using the free SwannView Link app Take command save money with an easy to install system that cuts the cost of crime, with no subscription, monitoring fees or ongoing costs required Compatible with Swann SWANN NVW-460 and Nvw 470 Pls check the compatibility before purchase.You can call Swann customer service at 18006272799