Features：--IP44 Wireless Doorbell--300m / 1000 Ft strong signal penetration--36 Ringtones and 4 adjustable volume levels--Easily cope with various places, villas / apartments / offices / hotels / nursing homes and other placesSPECIFICATION:Product Name: Wireless doorbellDoorbell Button: Uses a 12V,23A battery(but not included)Button Working temperature: -4 °F to 140 °FTransmitter size: 86*86*33 mmReceiver size: 90*56*20 mmPACKAGE INCLUDES: 1 * Doorbell Button2 * Receiver1 * Double-side tape2 * ScrewNOTE：Actual receiver signal, signal strength varies depending on environment and obstacles.Our doorbell is suitable for any different countriesTIPS:Due to the light and screen difference, the item's color may be slightly different from the pictures. & DURABLE:The IP44 doorbell button works perfectly even in the worst weather conditions such as heavy rain, direct sunlight and frost.The doorbell material is extremely durable and can withstand more than 100,000 knocks. ULTRA-LONG WIRELESS RANGE:Extremely strong penetrating performance,the receiving distance can reach 300 m/1000ft in a straight line,But it will not interfere with other devices in your home or neighbors. TIPS:Our wireless doorbell kit is your choice for villas / apartments / offices / hotels / nursing homes and other places,Can used as a wireless paging device when in need.Door bell button uses a 12V, 23A battery (but not included).Actual receiver signal, signal strength varies depending on environment and obstacles. EASY TO INSTALL :Simply the receiver into a power outlet,Use the provided screws or adhesive patch to install the Doorbell Button in any location in an indoor, outdoor door frame or garden. Upgrade your home with a wireless doorbell chime featuring long-range connectivity, adjustable volume, multiple melodies, and easy plug-in installation. Ideal for houses, offices, and apartments. Item Weight 1.76 ounces Manufacturer DUSAHDSG Item model number DUSAHDSG Batteries required No Package Dimensions 0.39 x 0.39 x 0.39 inches