Doorbells Security

1111MicrosoftInternetExplorer402DocumentNotSpecified7 8 磅Normal0Specifications Host Machine Color BlackMaterial Zinc Alloy ABSSize 165 87 36mmFrequency 433MHz ±500KHz Power Supply 4 AA Batteries A more→C Batteries Life About 12 monthsUnlock Methods Remote ControllersOperation Range Within 20m no obstacles Transmission Method RF Optional Type Standard version WIFI TUYA version Remote Key Color Black Size 60 30 10mmWeight 25g Function Unlock Lock Standby changed KeyPower Supply CR2032 3V Battery Life About 6 monthsStandard Number 2pcs included Max Keys Number 10pcs not included Features 1 Dual Systems and Circuits Design Equipped with dual systems and circuits this smart