Attention:can't program with other KERUI control panel directly as a standalone siren,can't work alone,only work with KERUI accessory,please set the same sensor to both control panel and siren,then when alarm is triggered, they will alarm together.We offer the upgraded version siren host from Nov,2019;different from old one is tone,more louder up to 115db,PLEASE NOTE an important tips:have to trigger the sensors within 2 seconds during the operation,or need pug in/out again into setting status.

Use: You will hear a Bi sound onces siren is plugged in, which means it is powered in. programing with accessory is by plugging/unplugging the siren in 3/5/7 times. It is a single siren, please program it with your existing sensors before use. For more details, please refer to video on youtube with "KERUI Standalone Alarm System Operation Guide"

Design: 115DB loud, Weather proof ABS plastic material allows you to mount the siren outdoors, just need to pay attention to the power cable. It is able to use siren and remote only to work together, to press emergency key on remote for immediate alarm, disarming key for silence and doorbell key for doorbell sound. Remote is essential for siren.

Expandability: Support 30pcs detectors(door contact, motion sensor etc.), 8pcs remote controls or wireless keypads(to activate/deactivate the siren), 4pcs doorbell sensors. More accessories in our shop supportable to DIY the alarm system based on your need.

Service: If you want a set of alarm system, please go to our official shop or contact us via amazon emails. We can also customize for you according to your detailed request.12-month warranty, lifetime free technique support and friendly customer service within 24 hours.