KGUARD SecurityInc. EL421-4HW227D-500G Easy Link Series 4 Channel QR Cloud 960H DVR with 4x 600TVL Cameras, 500G HDD Home Security Surveillance Kit QR code setup; Upload images to Cloud and access anytime anywhere;960H Recording; HDMI output; Motion detection with instant email notification Free Kview series allows remote monitoring and control on your smartphones and tablets 4 Channels & H.264 compression latest recording technology; pre-recording feature allows additional images to be captured prior to the motion detected event Waterproof case to protect the camera and weather resistant Quick Do-It-Yourself installation