DSE 2019: Southco Showcases Its Bluetooth Controller, a Tamper-Proof Latching System April 1, 2019 | Home / April 1, 2019 rave-video / DSE 2019: Southco Showcases Its Bluetooth Controller, a Tamper-Proof Latching System DSE 2019: Southco Showcases Its Bluetooth Controller, a Tamper-Proof Latching System for Technology in Public Spaces