Multi-function EMI power line filter, switch and plug, panel mount. Made by Qualtek Electronics, part number 860-10/024. Two configuratio, on and off, changes the switches position.
Accurate to drawing provided by Qualtek, and by measurements made by hand. Materials added, weight is close to correct weight, but internals are not done, so it is slightly off. Should weigh between 0.15 - 0.20 lbs.