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Doorbells without batteries

 prices on 2 models

 

— a kind of wireless bells with a receiving module powered by a standard 230 V household power supply. Inside the transmitter, such bells have a hidden mechanism with a piezoelectric element. By pressing it, there is a potential sufficient for the personal code of the call button to go on the air. The communication range of such devices often exceeds 100 m — they can be safely used not only in apartments, but also in private homes.
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Wireless Doorbell NO battery Waterproof EU Plug LED Light 300M Long Range Smart 433MHz
9.99Buy!
$
Banggood.com
Delivery: in USA
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Features 38 ringtones to choose from and 3 step volume control 0 85dB Eye catching backlight flashes when someone pushes the doorbell Particularly suitable for the elderly deaf and preg1nant wo more→men If paired with multiple push units in one system the chime can be set individually for each push unit Uses machine learning to prevent interference from other wireless transmitters Automatically saves selected ringtone after powering off Working frequency 433 MHz Receiving distance 300M in open area Transmitter size 75 x 51 x 20 mmReceiver size 95 x 65 x 24 mm Receivers Rated voltage AC 110V 220V 240V The transmitter 12V 23A battery battery not included Reminders 1 The button …
1-to-1 Battery-free Self Powered RF433 Wireless Doorbell EU Plug 38 Ringtones Outdoor IP44 Waterproof 150m Range Long Di
12.99Buy!
$
Banggood.com
Delivery: in USA
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Specifications Operating voltage receiver AC 100 240V transmitter Kinetics power generationPower consumption 0 25WWireless frequency 433 MHzOperating temperature 10°C 45°CRingtone volume 50dB 1m more→Wireless distance 150 meters open area Receiver size 66x50x60mmTransmitter size 70x46x20mmFeatures 1 The transmitter is powered by pressing and does not require batteries for life making it green and environmentally friendly2 90 decibels high volume four level volume adjustment can be set to mute3 Simple appearance mini and compact round and cute4 The transmitter is not afraid of water and can be installed outdoors or in a washing room5 38 ringtones to choose from pleasant and melodious w…
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