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Shelly BLU RC Button 4 ZB (Zigbee) Regeln 11 b g n Frequenzband: 2401 2483 МHz Shelly Accessories 11 b g n Frequenzband: 2401 2483 МHz Max leading to a significant optimization of monthly energy costs Long battery life – uninterrupted operation for up to two years Encryption – high security level
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