The MPI-36 Self-Contained Siren Speaker combination is now available in an attractive new grill design housing. It contains a heavy-duty mylar diaphragm speaker with a dependable 2-channel siren driver. Perfect for indoor installation. Features and Benefits Yelp and Steady Sounds Heavy Duty Speaker Magnet High Impact Plastic Enclosure Super Fast Mounting Quality Tested Siren Driver Circuit Attractively Priced Specifications Output at 10 Feet : (1) 6 Volts - 98dB (2) 12 Volts - 101dB Temperature Range : +50°C to -30°C Frequency Range : 700 - 2000 Hz Current Drain : (1) 6 Volts - .125 AMP (Steady) (2) 12 Volts - .350 AMP (Steady) Construction : High Impact, Bone White Plastic Strong Mylar Diaphragm Speaker Weather Resistant Two Seperate Sounds