SMAKN 4-port USB to USB Isolators/usb hub/Signal Power Audio Isolation Isolation Voltage: isolation chip 2500V; power system 3000VDC. Interface speed: low support usb 1.5M, full 12M. Compatible with USB V2.0; does not support pure speed 480M. Transfer: support USB control transfer, bulk transfer, interrupt. Dimensions: 78mm * 52mm * 30mm; Weight: 30g