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HUWOO Wireless Doorbell Battery Powered Door Bell Chime Waterproof Push Button 1000+ Feet 2 Receiver 3 Button for Classroom/Home/Office/Business/StoreWireless doorbell receiver features 55 chimes and 5 level adjustable volume(0 dB to 110 dB) to meet your needs for different occasions LED flash are suitable for the elderly and hearing impaired The i..