SPB5ECO DOSS 5 Way Master Slave Power Board Energy Saving 2Usb Green Doss 1 Switched Outlet, 1 Master Outlet : Amazon.com.au: Electronics
USB Master Slave Socket Power Strip Control With Power Switch M319 | eBay
WGESPB6: Energy Saving Master Slave 6 Way Powerboard | RhinoCo Technology
Master/Slave Power Switch 230VAC - Kemo M103N | Wiltronics
Brennenstuhl Secure-Tec, 6-pin power strip with surge protection and master/ slave function (3m cable and switch), colour: anthracite [energy class 0], 1159490936 3500 wattsW, 230 voltsV: Amazon.co.uk: DIY & Tools
Building a Smart Master/Slave Switch
Current Sensing Slave Power Switch
Current Sensing Slave Power Switch
Mains Slave Switcher - EEWeb
Energy Saving 6 Outlet Master/Slave Power Board with Surge Protector