Our extension leads with interference filter have surge protection and interference filter for each socket. ARMY filters are complemented by a high-attenuation interference filter. This connection of two devices forms one unit. The leads are intended as protection against mains voltage faults. They are used to split voltages for very sensitive and expensive electronic devices, computer and audio equipment and special military purposes. The entire set of filters is designed and inspected to meet the technical requirements of the army and the NBU.