Symmetricom 1520R-S300 Rack Mountable Network Time ServerBrand: Symmetricom Model: 1520R S300 Description: Symmetricom SyncServer S300 Rack Mountable Network Time Server 1520R S300 Condition: USED TESTED WORKS AS EXPECTED 30 Day Money Back Guarantee With Seller Paid Return Shipping Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the sellers