Product Features 5-Levels Volume + Flashing Light!Can get higher levels of sounds that you could hear it throughout anywhere at home when someone rang the door bell. When you can't hear the bell ring in a noisy environment, it blinks on the receiver when someone's ringing the doorbell, so you can get the signal that someone is coming to visit.Decide Your Mood! It rings in different tones, not just the regular same old one everyone is used to, Ding Dong.If you are being bored with the classic sound 'Ding Dong' , why not choose this Doorbell with 55 ringtones? From now on, try to select another new different melodies to change your mood!Stable Signal and Stronger Penetration!Super wide operating range of wireless transmission, ultra strong penetration and more stable signal make sure that you can hear the doorbell ringing anywhere at home even at outdoor!Energy Saving!Doorbell button only use a 23A 12V battery in a year for its less power consumption.Not only save your money also reduce batteries trouble.CertificationOFTUZ doorbell has been certified 'CE, FCC, PSE and RoHS' .Specification Working Voltage of Plug-in Receiver: 110-260V Battery in Transmitter: 12V 23A Alkaline BatteryVolume:5 levels from 25dB to 100dB Working Temperature: -30℃ to 70℃/-22℉ to 158℉ Doorbell receiver's size: 3.2 * 3.2 * 2.0 inches Doorbell button's size: 3.0 * 1.4 * 0.7 inchesNet weight: 0.33lb Gross weight: 0.44lb PACKAGE 1 * receiver 2 * transmitter（12V 23A alkaline batteries are included) 2 * double-sided tape 1 * screwdriver 1 * user manual (English) WARM TIP! Please DO NOT put the transmitter close to any electronics or metallic surface or the signal might be interrupted.If there are metal walls,please test the operating range before mounting the transmitters.
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