The TALIS II SM BOX 20 with Back box is an electronic device manufactured by Graesslin. It is designed to provide monitoring and control of systems, such as HVAC units. It features a 20 mm din rail mounting box with a sealed back box and 18.06.0020.1, 18.06.0021.1, and 18.06.0024.1 connectors. The device contains two capacitors for a capacitor motor-start, one capacitor for fan-start, and a full-bridge, three-phase motor-starter for single-phase and three-phase motors. It also includes a high current, low voltage circuit breaker, as well as a temperature monitoring system and vibration monitoring system. The device is CE compliant and certified to meet UL and cUL standards.