Two in a single cabinet – Mcp Speaker &Talkback. • Easy to installation • Talk back facility with same speaker • Switch for press to talk • Hi-Intensive sound (80 to 100 db) speaker • Cable entry from top or backside of the unit. New elegant design • Strong adaptability for environment • THT design, High stability • 9-28 Voltage wide operating range • Low standby current • Comes with metal hammer attached by chain.a • Red dual LED indication at fire /Alarm condition • wall mount type • Low maintenance.