The Apollo Discovery Base Sounder White with Isolator 45681-702APO is a reliable and high-quality product designed for various applications. With a quiescent current of 370μA and operating temperature ranging from -20 to 60°C, this unit is suitable for use in a wide range of environments. The white-coloured sounder features a diameter of 115mm and weight of 140g, making it compact and easy to install. Built with polycarbonate materials and EN 54-3 EN 54-17 standards, this unit also has terminal functions for +R remote indicator positive connection. Manufactured in the United Kingdom by Apollo, this sounder is a trusted choice for various settings.