how to use emergency button for alert notification siren to household

how to use a emergency button panel or wireless remoter and ethernet relay board KC868-H32B or other model to make a simple alarm system for old man. You can install many wall switch panel in different room for old man and old woman to use. The switch panel can use dry contactor self-reset type button or use traditional switch panel.

Subscribe to KinCony IOT for weekly tech amusing DIY videos hosted by XuWei! We will continue to develop IOT and smart control system and make video lessons provide smart solution products and service around the world.

visit for more:
KinCony's website: https:www.kincony.com
Facebook:   / kincony.smarthome  
Twitter:   / kincony  
Aliexpress Online Store: https://kincony.aliexpress.com/store/...