Interpret failover command on my asa

Hi Everyone, thank you very much for your help in advance...
I would like to ask if you can help if you can interpret each line of the following commands means, and how the failover works (with the settings below)?
failover
failover lan unit primary
failover lan interface failover Management0/0
failover polltime unit 3 holdtime 9
failover replication http
failover link failover Management0/0
failover interface ip failover 192.168.0.1 255.255.255.240 standby 192.168.0.2
icmp unreachable rate-limit 1 burst-size 1
failover
failover lan unit primary
failover lan interface failover Management0/0
failover polltime unit 3 holdtime 9
failover replication http
failover link failover Management0/0
failover interface ip failover 192.168.0.1 255.255.255.240 standby 192.168.0.2
icmp unreachable rate-limit 1 burst-size 1
THank you very much for your help
Takami chiro

failover : Enables Failover.
failover lan unit primary : Makes the unit that this command is entered as the primary FW
failover lan interface failover Management0/0: Specify which interface will be used for exchanging FW Hellos and other messges.
failover polltime unit 3 holdtime 9 : This command changes  the frequency at which Failover hellos are sent to the other FW
failover replication http : Enter this if you want http sessions to be replicated to the standby FW. if this is entered, user will not have to refresh his browser.
failover link failover Management0/0 : Specify the interface for exchanging state information.
failover interface ip failover 192.168.0.1 255.255.255.240 standby 192.168.0.2 : Specify the Failover IP addresses.
HTH
Zubair

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