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KERUI M525 Home Security Welcome Wireless Doorbell KERUI specialized in producing high-quality wireless doorbells, we sell wireless doorbells have passed CE and RoHS certification. We are an honest brand and we have 6 months warranty or replacement commitment. Main Features: 1. Button is Waterproof ,Don't worry about extended use 2. 3-Year Battery Life 3. Up to 500ft Ultra-long Transmission Distance 4. Easy to install with the double side adhesive tape or the screws IP55 Dustproof and Waterproof Works between -4 °F to 140 °F; withstands various harsh weather conditions Ultra Long Operating Range Operating range up to 500ft / 150m in open area, ensures you to hear and answer the doorbell in time. You will never miss a visitor even if you are a few rooms away or on another floor High Performance Transmitter Ultra-low power consumption; uses a CR2032 lithium battery that boasts 3-year maximum lifespan F15 , Press To Trigger , IP55 Waterproof Rating F52 , Touch To Trigger ,IP66 Waterproof Rating 32 Ringtones and 4 Adjustable Volumes The wireless doorbell offers a wide selection of 32 melodies and 4 volume levels to meet your needs for different occasions. Flashing light with audio alert indicators which is easy for people including the hearing impaired to notice. Easy to Install Just plug the receiver into power socket and attach the transmitter on door, you don`t even necessarily have to make holes or damage anything. Support Expandable Already paired before factory and different transmitters can be set to different tunes. Expandable up to 20 accessories Product Details: 1. Working Voltage: AC 100-240V 2. Working Current: < 100 mA 3. Wireless Frequency: 433 MHz 4. Working Temperature: -10-50 degree centigrade 5. Wireless Distance: about 100 meters (Open area) Frequency: 433Mhz Operation Current: 8~15mA Quiescent Current: 3uA Operation Temp: -10C~50C; Humidity : no more than 90% Battery F52 Waterproof Button : 23A 12V / CR 2032 (battery included) F15 Waterproof Button : CR 2032 (battery included) Attention: 1. Please check the socket type before selecting the power plug, We have EU/US/UK plug, If you need AU plug, please contact us before payment. 2. The doorbell is not applicable to metal doors. Customs Tax&Duty: Buyers are responsible for Customs Duty/Taxes, If you have any questions,please contact us after payment. Ship from RU/ES/PL/US warehouse will be FREE of Customs Tax and Fast delivery. RU warehouse only ship to local address. ES warehouse can ship to the Local (except for the Canary Islands) and below countries:PT, FR, DE, IT, AT, CZ, DK, LU, NL, BE, UK, HU, PL, SK, SI. Poland warehouse can ship to the Local and below countries:PT, FR, DE, IT, AT, CZ, DK, LU, NL, BE, UK, HU, ES, SK, SI, IE, FI, LV, LT, SE, BG, EE, GR, RO. More Recommendations: