Double-through switch is used in areas with a large area, shopping halls, warehouses, production halls, country houses. Characterized convenience by enabling the user to one place in the more distant off. In the presence of two keys, it is designed for two different customers. Installation is carried out respecting the specificity of an electrical circuit. It has modular attachment that provides fast installation in a special landing nest wall. Qualitative dielectric material does not deform when heated. Specifications do not change at low and high temperatures, work from -20 to +40. Clamping fastening firmly planted in the board and reliably fix the lead wire. Plastic white does not yellow over time. It made concise and fits into any interior. Resistant to breakdowns network. The maximum permissible nominal voltage of 260 V with a frequency of 50 Hz.