2M1 Miniature Toggle Switches Carling Technologies 2M1 Miniature Toggle Switches offer a choice of ratings, circuits, contact materials, terminal plating, and toggle styles. Carling 2M1 Miniature Toggle Switches have an operating temperature of -30°C to +85°C. These COTS (Commercial Off-The-Shelf) switches are designed and tested to withstand demanding military environmental requirements. Applications include communication, GPS tracking, radar, mobile medical, and audio/visual equipment.