• 【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.
• 【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.

Shipping Note: Shipping to Alaska, Hawaii, PO Boxes, and APO addresses is not available for this item

Warranty: 90 Day Woot Limited Warranty