Server License (includes license USB connector) with support (allows updates and remote technical support, with additional developments that involve engineering NOT INCLUDED) for 1 year. Includes 2 Clients with support for up to 5 Clients sold separately. Also supports Mercury™ (LENEL™, HONEYWELL™, Open Options™, Red Cloud™, etc...) hardware up to 64 doors sold separately. UnityIS™ Lite is the perfect solution for small to midsize sites requiring access control using Mercury hardware only. Please Note: Systems requiring video, intrusion, more than 64 doors and/or 5 Clients can upgrade to UnityIS™ Professional.