Home Slickdeals Harman Kardon Invoke Smart Bluetooth Voice-Activated Speaker w/ Cortana (Graphite or Silver... Slickdeals Harman Kardon Invoke Smart Bluetooth Voice-Activated Speaker w/ Cortana (Graphite or Silver Pearl) $49.99 + Free Shipping By ARCOM - 20 September 2018 174 0 SHARE Facebook Twitter Go to the deal page: Harman Kardon Invoke Smart Bluetooth Voice-Activated Speaker w/ Cortana (Graphite or Silver Pearl) $49.99 + Free Shipping