1. One magnetic sensor can match with at most 8 remote controllers freely.
2. One remote controller could control several magnetic sensors.
3. Excellent home use product tiny and fashion.
4. Volume: 110DB.
5. Alarm and door bell function for your option.
6. Low energy and long work time.
7. Simple install, easy to use.
8. Function: Anti-theft alarm function; Entrance remind function.
9. Application places: Home, workshop, office, store, etc.