Communicate and stay close by during adventures with the National Geographic Walkie Talkies. They are designed with youngsters in mind so they can have great fun with a practical purpose. These devices have a range of up to 6km and they can be used in all sorts of situations like trekking, orienteering or at a theme park. They are particularly useful with slightly older children with whom you might just want to keep in touch if they are relatively close by. Just like professional walkie-talkies, these devices have a range of communication channels so if other users are in the area, you simply change channels and keep the airwaves clear for your use. These units have a range of ten different call melodies and eight narrow-band channels with an earphone socket for connecting headphones or earbuds (not included). These units also feature LED lights which can be used as handy torches when required. 3 x AAA batteries required for each device.