UPGRADED DESIGN: This adapter is a upgraded version, Support Data transmit and power supply, IOS Device etc. ADAPTER: USB A Male to Female Extension Cord with 304 Rocker Switch. CABLE GAUGE: 28AWG, Total Length: 40 inch /100 cm , Support 5V, 3A (Support raspberry pi power Extension Cord, high-power devices are not supported) APPLICATION: Add an on/off switch button for Driving Recorder Power Cable, LED Desk Lamp, USB Fan, Bedside Lamp and other computer peripheral low-power electrical devices. Warranty: With 18 months warranty, ANDTOBO 24H customer friendly service