Features: * Etiger ES-S8A works as an additional siren, connected to an existing alarm system, eTIGER SECUAL alarm host, so that you don\'t need to pull a cable. When the strobe siren is triggered, the device will send out a 100 decibels audible alarm and light flashing visual alarm, threat and prompt. * Standalone system, connected to an eTIGER sensor. Build a basic and efficient alarm system with litteraly zero cable. The only thing you need for that is to connect this ES-S8A to an eTIGER remote control and at least one sensor (door/window contact, motion sensor, etc., supports up to 20 accessories). * New type of 433MHz solar powered outdoor strobe siren with sound and light alarm function, no electricity cost, energy-saving, eco-friendly and safe for your family. * It can intelligently recognize the repeated shaking of characters and reduce misjudgment. Digital design and judgment, zero false alarm. The patented Fresnel lens is used to effectively overcome the false alarm caused by sunlight interference. * IP44 waterproof, the siren can be installed outdoor as it does not fear rain. The perfect siren for houses with a garden. Easy to install without debugging and wiring.