According to the manual its rated at 15A.
iHome + HomeKit
Controlling this HomeKit-enabled accessory requires an iPhone, iPad, or iPod touch with iOS 9.0 or later.
Control your SmartPlug away from home
Controlling this HomeKit-enabled accessory away from home requires an Apple TV (3rd generation or later) with Apple TV software 7.0 or later and an iPhone, iPad, or iPod touch with iOS 9.0 or later.
iHome + Amazon Alexa
Works with Alexa enabled products
Simply talk to Alexa to control your SmartPlug connected lights and appliances
iHome + SmartThings
SmartPlug works on the SmartThings platform
Control and automate the smart devices in your home in one simple app.
iHome + Wink
Works with Wink
SmartPlug integrates with your Wink app. No hub required! Create Robots and Shortcuts with your other