GoodPro Wireless Doorbell with 1 Remote Button and 2 Plugin Receivers, LED Doorbell Botton Waterproof Operating at over 280 Meters Range 36 Ring Chimes 4 Adjustable Levels Volume for Home Office 918ft Working Range: The wireless doorbell operating range up to 918ft/280m in open area ensures that you will never miss a visitor's arrival and answer the door in time. Especially Two Receivers will not interfere with other equipment in your home or those of your neighbors Battery Operated Transmitter: Remote Push buttons triggers and offers a feedback flash for easy reference,IP44 waterproof and dustproof design withstands various harsh weather conditions for outdoor use Two Plug-in Receiver: Upgraded plug-in receivers will delivers rich and crisp sound; 36 Chimes Melody Ring for selested (including short and useful dingdong and happy Christmas melody etc.) & 4 Levels Adjustable Volume from 25db-110db (High, Middle, Low, Muted) Easy Pair Installation: Superheterodyne learning code. Free pairing by user. DIY set up the transmitter via adhesive tape. CE, FCC, RoHS certified. Package with Warranty: Included with 1*Transmitter+2*Receivers+1*112V23A battery+1*Adhesive tape+1*Instruction Manual; 3 Months Money Back 1 Year Replacement Warranty,100% Satisfaction of Customer Service.