Havells Crabtree Signia 2M Indicator Bell Switch – Grey The Havells Crabtree Signia 2M Indicator Bell Switch – Grey is a premium modular switch designed for convenient and safe operation of doorbells and connected devices. It features a built-in indicator light that helps easily identify the switch status, especially in low-light conditions. With a 10A rating, it is suitable for controlling bells, lighting circuits, and small appliances. Made from high-quality fire-retardant polycarbonate, it ensures durability and long-lasting performance. The elegant grey matte finish enhances modern interiors, while its modular design allows easy installation and seamless compatibility with Signia plates.