OfficialParts Specialist Since 2016 Trusted by 120,000+ European drivers, explore our certified accessories collection directly from the seller profile. Wsdcam Window Door Alarm DIY Home Safety Wireless Burglar Alert Sensor Alarm-10Pack To use the simple door security devices for Do-It-Yourself Home Security Sensor System Give you peace of mind, and keep yourself and your property safe &security. Wsdcam Door and Window Alarms will be triggered immediately once the two parts separated (wireless alarm host and magnetic strip). The portable alarm system come with 4 in 1 function -- General Alarm, Constant Alarm, Closing-door Alert, and Door Chime. 110 db loud alarm helps deter intruder and possibly notifies neighbors/homeowner, also helps notify you if visitors/children/Alzheimer/dementia patients/pets or others are coming/going. Product Feature: Well-made & Durable Quality 110 dB Loud Alarm 4-in-1 Mode Small & light-weight Super Easy to Install and Use Low Battery Indicator Package Including: 10 x Window alarms 10 x LR44 cell batteries Double-sided adhesive tapes If you have any questions about the product,please feel free to contact us,we will help you solve the problems in 24 hours.