In the Jablotron 100+ (JA-100+) system, special attention is paid to the production of external sirens. The external sirens in this system can be wired or wireless, depending on the needs of the project and the user. The characteristic of sirens in this system is that the basic electronics are delivered separately from the protective cover of the siren, so that the color and finish of the siren can excellently fit into the general appearance of the building or facade. External sirens from the Jablotron 100+ (JA-100+) system are not compatible with external sirens from the Jablotron 10 (JA-10) system.