This was back in the 80s and 90s. We always used this method to gain range. Just hold the remote to your chin.
My Python system has a mile range, and the remote has a status display and vibrates and beeps for the different alerts (bump/break-in/low batt, etc). It’s pretty cool. If my son is playing his stereo too loud in the garage/shop, I can trip my car alarm without walking downstairs. LOL.