Matrix switch/control system 1.1 year arranty,lifetime maintainance 2.OEM ... ,upgrade anytime Support hot swapping Based on ethernet 32 groups switch automaticlly,synchrnously Timeing arming and disarming.18 alarm modes screen ... ,ISO9000 quality system certification,CE certification. Award as“quality,honesty,service AAA grade unit” and ”Chinese famous products” technical targetcommunication method ...