EmpayarUtama - Friday, 4 March 2022 : 
You can enjoy a reliable and convenient doorbell system in homes, factories, offices, classrooms, apartment buildings, villas, restaurants, storage rooms, and other large areas.
Easy to install. You can choose one of two simple installation methods: use the double-side adhesive sticker to fix the transmitter cover on the wall, or use the provided screws to fix it in place. All necessary accessories are included in the package for easy installation.
Doorbell with Number Display. The receiver will flash the number corresponding to the button when someone presses the transmitter button. A receiver can be configured with multiple transmitters, and each different button will display a different number.
DAYTECH DB17 Waterproof Door Bell
With time display and storage functions, the easy-to-use design enhances the user experience. 38 tunes to choice, and you will be able to find what you like.
Memory Function - Remembers your last set melody after a power off; no need to reset to your previous settings. Convenient and easy-to-use design to enhance user experience. There is also a silent mode, if you don’t want someone to interrupt your rest, you can adjust it to silent mode.
There are 4 levels of volume that can be adjusted, the loudspeaker's sound is as high as 110dB, ideal for helping the elderly to pay attention when someone touches the transmitter.
Long Operating Distance. It is about 300m in an open area, about 20-40m indoor. Low power consumption with LED Indicator. The transmitter requires a 23A 12V alkaline battery.
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