Intelligent Remote Power, Voltage, Current And Power Metering Wireless $ 19.18 Specification: Product model: Sonoff POW R2 Input voltage: AC 90-250V Maximum power: 3500W Maximum load: 16A Security mechanism: WPAWPA2 Wi-Fi: Standard: 2.4GHz 802.11 /b/g/n Type Controller Packing list: Controller x1