APC On-Site Service On-Site Warranty Extension - Extended service agreement - parts and labor (for UPS battery) - 2 years - on-site - business hours - response time: NBD - for P/N: SY30K100F-NB/ SY40K100F/ SY50K100F/ SY50K100F-NB/ SY50K80FD/ SY80K80FD/ SY