VTech KidiGo Walkie Talkies DX for Kids Ages 4+ | Long Range Children's Walkie Talkie Set with 2 Radios, 3 Channels & Clear Sound | Perfect for Outdoor Adventures, Camping & Backyard Play

These things are great to give your kids the walkie talkie experience without exposing them to any local creep with a radio. They use a band between 2414 and 2474Mhz with a max rf transmission of 0.01W._____________________Update:These will not penetrate the exterior walls of my house. They work fine inside even with doors closed, but the insulation is enough to block the signal and the devices lose connection. Kinda bummed, wanted the kid to be able to play walkie talkie while I'm out in the close, but detached garage. My router has much better range from inside the house but doesn't cover the whole yard, I may look for a wifi based system to maintain privacy for my desired use. These are still a good secure kids option for playing in the yard or inside, just not both at the same time._____________________They are about the size of a cordless landline, but a little shorter and wider (Only one can transmit at a time so they function as walkie talkies and not a short range phone). Volume adjustment does not get quiet as I'd like at the low end but they are plenty loud. Voice quality is fantastic, super clear thanks to the digital transmission. Slight delay. Visual indication on the device showing if it connects or not to the other while trying to transmit.Has a few simple games, if the other unit transmits while you are playing a game, it rings like a phone and you can choose to deny the transmission and keep gaming or answer it and close the game.