Looks like US versus Canook
United States . . . . . . . . . . . . . . . . . . . . . KR5S120123
Tire guard transmitter type S120123 which includes an integrated pressure,
temperature and acceleration sensor and a 315 MHz RF transmitter.
- RF receiver unit which includes a 315 MHz receiver
Canada . . . . . . . . . . . . . . . . . . . . . . . . 2671-S120123
The search on Canada's web site is not participating this crappy Monday morning but I bet the other freq is for the northern part.