Smartrul WIRELESS DOOR BELL - BLACK BATTERY MODEL (2 Button / 2 Receiver) sports dress or a quick head to

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Smartrul WIRELESS DOOR BELL - BLACK BATTERY MODEL (2 Button / 2 Receiver) sports dress or a quick head to60 Music Selection The doorbell has 60 melodies for you to choose from, and the doorbell volume has 4 adjustable levels, namely "Large, Medium, Small, Silent" levels, from 0dB to 110dB. The pleasant sound of the wireless doorbell can spread throughout the house and walls, and can be heard anywhere in the house to notify you that a guest has arrived. Battery free transmitter The transmitter of this wireless doorbell does not require the installation of