A simple elegant design wireless doorbell to install in any section of your home,business pace,office,shop,etc. Easy Installation:just plug receiver into an electrical outlet,the door/window sensor can be easily mounted to anywhere with adhesive tapes. The magnetic door sensor activates when the magnetic stripe is separated more than 0.4 inch,this transmits a signal to the wireless portable receiver and alerts you with a chimes when the door is opened. -detect any break-ins with a alarm chime -If you have a pet,you can add one sensor to your pet's door,you will get a notice whenever your pet is coming home. -Help you to keep children safe by notifying you if they open the door. -You can add one contact sensors to your garage so you will know whenever some one is visiting -If you have your own business shop,this wireless doorbell contact sensor combo will remind you whenever your customers come. Specification: Voltage of plug-in receiver: 110V(US) Expandable to multiple smart receiver or transmitter: Volume range: 25to 100 dB Working Frequency: 433.92 MHz ± 280 KHz Working Temperature: -15°C to 60°C Contact Sensor: Wireless transmitting distance:≤80m（in the open area） Transmitting frequency:433.92MHZ Operating Voltage:3V DC(1*CR1632 battery) Installation gap:≤1CM Function:easily monitor opening of doors and windows,the transmitter and magnet will be separated and trigger alarm Package Included: 1 x Plugin receiver 2 x Door/window sensor 1 x Accessory pack（12 months worry-free warranty） Customer Service: Any problem with our products, please feel free to contact us! We will get back to you whenever you have a question. Click "SSG" → "Have a question for SSG?" → "Ask a question"
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