Kinetic Mylarcone Extension Speaker has been utilized as the internal sounder of choice in literally millions of security system installations worldwide for the past two decades. Sleek and attractive low-profile ABS casing with the option of a two-way anti-tamper microswitch for wall and lid. It can be installed as an ancillary sounder to any security alarm system complying with EN50131 up to grade-3 and environment class-2 provided it is not acting as the principle warning device for notification purposes.