Home Slickdeals Harman Kardon Invoke Speaker Owners: Cortana End-of-Service Offer, Get $50 Microsoft GC... Slickdeals Harman Kardon Invoke Speaker Owners: Cortana End-of-Service Offer, Get $50 Microsoft GC Free By ARCOM - 2 August 2020 98 0 SHARE Facebook Twitter Go to the deal page: Harman Kardon Invoke Speaker Owners: Cortana End-of-Service Offer, Get $50 Microsoft GC Free