Walkie Talkie Rechargeable, Greaval PMR446 Two Way Radio, 22 Channels Long Range Walkie Talkies for Adults, License Free Walky Talky with Earpiece and USB Cable (Orange 2 Pack): Amazon.co.uk: Toys & Games
Wireless Microphone Frequency information from Sennheiser
Comprehensive CB / HAM radio frequency chart 10 and 11 meter free band - CB Radio UK
CB radio Frequency chart SS low to SS High full colour - CB Radio UK