Expandable Doorbell System?If you have any quality problems, you can reach out to us for after-sales services; expand your existing doorbell system with up to 2 transmitters and unlimited receivers, build your own simple alert system. ?EASY TO SET UP?Simply plug the receiver into a power outlet and attach the transmitter to the exterior wall with the provided screws or adhesive patch; there is no need to reset tune and volume level after a power outage. ?WEATHERPROOF & DURABLE Ultra-low power consumption and CR2032 lithium battery gives a lifespan of up to 3 years; no need to worry about frequent battery replacement; IP55 waterproof rating to withstand the harshest weather (-4 °F to 140 °F). ?52 MELODIOUS CHIMES?The receiver bell with 2 receivers features 52 tunes and 5 adjustable volume levels ranging from 0 to 115 dB; an LED indicator alerts those with impaired hearing or when the doorbell sound is (temporarily) unwanted. ?ULTRA-LONG WIRELESS RANGE?This wireless doorbells boasts a remote connection of up to 400 M/1,312-FT and does not interfere with other equipment in your home.
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