APC On-Site Service 8 Hour 7X24 Response Upgrade to Existing Service Contract - Extended service agreement - parts and labor - 1 year - on-site - response time: 8 h - for P/N: ACRC600/ ACRC600P/ ACRC601/ ACRC601P/ ACRD301/ ACRD301G/ ACRD600P/ ACRD601/ ACR