spy gear , toy walkiie talkies
the nerf radios are on 49.860 Mhz BUT they are in AM mode the spy gear radios at least the one I have for my son are 402 Mhz
I have several old school radio fm radios I saved almost all of the radios in the 80s where on 49,830 49.845 49.860 49.875 and 49.890Mhz, its true most of the one toy radios were also ch 14 am "cb" . now a days they are on the frs ch's 1,3 or 6 no pl tone of course. however I have found a few in the 900Mhz, these radio "act" like a cell phone with voice mail and pre set tones and a 7 digit number these radio were not very popular and the range was not so great but neat all the less. what I liked about them was they "hopped" freqs in the band so picking it up on a scanner was very hard to do I think it was by v-tek? no 100% sure on the brand. the 49Mhz radio band is coming back slowly I have seen mostly because not to many other people use them any more so it less likely some one would listen in. hope that info helps out!