SONOFF Smart Stackable Power Meter

【Connect up to 32 SPM-4Relays】One SPM-Main can be connected 32 SPM-4Relays. Each SPM-4Relay has 4 isolated channels to help you manage devices more conveniently. SONOFF Stackable Power Meter realizes smart management with overload protection, metadata monitoring and electricity statistics, support power-on state (the firmware of the main unit, 4-relays is upgraded to the version 1.2.0 and the eWeLink app is upgraded to 4.23.0). The SPM-Main communicates with the cloud through Ethernet or WiFi, and communicates with the SPM-4Relays through RS-485, which allows for multi-terminal and stable long-distance data transmission. Want to know the power consumption changes of each stall? Want to realize the unified management of the whole shopping mall? By checking eWeLink App on your mobile phone, you can monitor the electricity usage without leaving home. Through the eWeLink App, you can obtain the power consumption through a touch. Once the overload protection is enabled, you do not need to w