wireless and battery-free doorbell
Products: Transmitter (switch)and receiver (A set)
Advantages:non-wired,selfpowered,nobatteryrequiredandmaintenancefree.
Frequency: 433/315/868/915 MHz
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wireless socket | Products:Transmitter(switch)andreceiver(Aset) Advantages:non-wired,selfpowered,nobatteryrequiredandmaintenancefree. Frequency:433/315/868/915MHz |
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