Radio that to a limited extent to lets say 5 PE shares the Line of View with other players on the same channel, the radio must be in hand however, and works like googles, meaning player using them cannot see further then 5 PE himself. If the player has lower PE then 5, then he's PE is the one that counts, meaning, a player with PE 3 shares field of view of 3 PE not 5, a player with PE 10 shares PE of 5 not 10. This could be intresting tactical features.