Satlock November 27, 2017 CalAmp Reading Time: 2 minutes Satlock chose two CalAmp products that were a fit for the ULTRALOCK products. The TTU-1230 and TTU-2830 are both small, battery-powered GPS devices that equip the ULTRALOCKs with the needed technology. Customer Satlock Feature TTU-1230 TTU-2830 View