DC12V,9V battery convenitent installation can work with alarm main panel wireless and wired use Technical Data1. 9V spare replaceable battery2. Special protection design of wiring module3. Convenient installation4. Light labyrinth5. CMOS design6. Best adaptability with environment7. Manual test8. High stability9. High Density SMT Design10. Unique structure with dustproof, anti-fly, anti-light ...