The Kryptonite I use is a U-lock. Pretty heavy duty and heavy.
https://www.amazon.com/gp/product/B001DWNK1A/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
The cable is to lock the wheels and seat, not the bike itself. The bike is locked by the U-Lock.
Trackr is just Bluetooth based. I work too far away from my bike. I was thinking more along the lines of a TK102-2 (original) with an iOT Sim. There is also a satellite based one: Spot Trace. Costs $100/year in service in addition to the device and sends a ping every 5 minutes.