The Inter range of internal sounders are designed for use in domestic applications and are available in three versions: • High level sounder • High (alarm) and low level (entry/exit) sounder with strobe • High (alarm) and low level (entry/exit) sounder They are also available with or without an internal battery for SAB or direct operation (see table). The sound output for all models is 110dB(A). They have a low current consumption and feature engineer mode for silent start up. The devices have a modern, stylish polycarbonate cover which can be screen printed with a company logo if required (not 500(S) model).