These are nice little plugs to measure watt usage of any appliance in your house. Long ago I bought the one with the lcd and recently the smart one which works with an app on your phone and that I control with my google mini. You can input your kw/h cost and it will calculate the cost for you. Where I stay in JHB and the bracket we fall in we pay R1.59 per kw/h
Measures electricity usage Wattage: 0~3300W (Max 3300 watts) Voltage Current: 0-15A (Max 15A) Power Factor Electricity Cost
www.geewiz.co.za
Easily Manage Your Home Electronics and Appliances Anytime, Anywhere The Smart Plugs are easy to set up, and make it even easier to manage your household electronic devices
www.geewiz.co.za
Edit: these are also handy to check the power usage all the equipment you want to use during loadshedding to get idea how long your UPS for instance should last. Talking of which, ours is starting in 14 mins