Good device, has two keys, but only one is two-way

Good device. I bought it on sale, so for the sale price it worth having. It has two keys, one is two-way (you can see if your car started), and another one is just one way, which I didn't expect. I was hoping both keys are two-way. The installation by the Geek Squad professional took about 2 hours. I haven't tried it during a winter yet.