Smart stackable power meter Sonoff SPM- 4RELAY

The 4Relay is the required unit which works using the SPM-Main unit.

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.

**Note : The Main Unit and 4-Relay of the Stackable Power Meter need to be used together. The Main Unit is connected to at least one 4-Relay to function.

Features

• One SPM-Main can be connected  with 32 SPM-4Relays.
• Power metering – You can monitor the power consumption by checking eWeLink App on your mobile phone. Obtaining current, voltage and power easily.
• Max. 20A/Gang – Each channel can support maximum current of 20A, no fear of high power load.
• Communicated by RS-485 -The SPM-Main communicates with the SPM-4Relays through RS-485, which allows for multi-terminal and stable long-distance data transmission.
• Overload Protection – Once the overload protection is enabled, it can protect your devices from burning out.

Specifications

• Wi-Fi:  802.11 b/g/n 2.4GHz
• Micro SD card storage range:  8GB-32GB
•  Input:  100-240V~ 50/60Hz 20A/Gang 80A/Total Max
• Output: 100-240V ~ 50/60Hz 20A/Gang 80A Total Max
• Dimensions: 250x90x66.5mm
• Color: White
• Shell material:  PC V0