Features: 38 music ring tones optional, while the music is on, the LED flashes simultaneously. High-frequency vibration, penetrating ability. Simple design, elegant, chic style. IP44 level waterproof. Suitable for big and high floor houses, offices, factories, hotels, etc. The transmitter is installed outside the door, press the button and the bell rings inside. 3 kinds of volume adjustable, the sound is loud and clear.
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