Some girl help

So I’m trying to buy a gps for a car to track my husband ! He currently works at a club and he’s been getting home at 4:30-5 am and I keep asking him where was he he always gives me a bullshit story I used to work there with him and we used to get home 2:30-3 am and sometimes I go with him but now I can’t we have a daughter she’s 1.5 years so I was to purchase a tracker but idk where to start please help a girl out