Product Features: This wireless doorbell has an effective wireless range up to 900 ft, which means you may plug in the chime anywhere you’d prefer in your house and never miss any visitors. Also comes with 52 different melodies to choose, 4-levels volume setting from 25db - 110db. Then, you can change tones and set up a reasonable volume according to your preference. Its extendable feature, allowing you to add more receivers or more transmitters, meets the need for more doors. How to select a ring-tone? The plug-in receiver provides a choices of 52 different melodies. When it is plugged in, press the forward and backward button to play previous or next tone, until you hear a melody you like. How to set volume? Press the volume control repeatedly until the desired volume is achieved - 4levels are available as a circle. Designed for meeting the needs of your versatile life, you can use it as: 1. A door bell for your house to remind you that visitors’ arrival 2. A gadget for small classes to draw kids’ attention 3. A tool for pet training to lead your doggy practicing 4. A pager for the senior or pregnant to get instant assist 5. And more great ideas you can imagine Specifications: Receiver Working Voltage: AC 90-250V Receiver Power Consumption: 10mw Receiver Volume: 25-110dB Transmitter Battery: 23A/12V Alkaline (included) Transmitter Power Consumption: ≤0.01mw Transmission Range: 900ft (in open area) Contact us: The products comes with 12 months warranty from the date of purchase and life time technical support. Please always feel free to contact us, we will get you covered.
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