It came with my NVR - serial: DS-7608NI-SE/P0820151207BBRR559408284WCVU
Half briked my NVR : DS-7608NI-SE/P - Tried upgrading NVR from V2.2.5 build 150421 to V2.3.12 build 160622 (US)
Coming from a Uniview background with seamless upgrade experience I didn't realise how careful you need to be...