It is also known as 9V, PP3, LR22, MN1604, BLOC, E-BLOC, 6LR61, 1604AU, X22, 1604, 1604A, 1604AC, 4022, 522, 6AM6, 6F22, 9VOLT, A1604, CLR6, K9V, KA9, ND65V, R22, RB100890. It consists of a photoelectric system, a signal processing identification circuit, and an alarm circuit.
