Using these walkie talkies is super easy. First, turn them on by sliding the power switch. Then, select the same channel on both walkie talkies so you can talk to each other. Press the talk button when you want to speak and release it when you're done listening. As for the range, you can use them within 400 feet in the house or yard. When it comes to battery life, make sure to use fresh batteries to keep them working well. If they're not in use, turn them off to save power. Also, keep them away from water and rough play to avoid damage. And when you're done playing, store them in a dry and safe place. That way, your walkie talkies will last a long time and keep providing fun for your kids.