Product Information Energy monitoring: measuring and calculating the energy consumption and the cost of your connected devices. Total 7 monitoring modes, this power meter for socket supports monitoring time, power, costs, accumulated power consumption, voltage, frequency, current, power factor, minimum power, maximum power and electricity price. Easy to use: simply press the FVNC button from the power meter for socket to select the monitoring mode, the COST button to adjust the power price of the unit, the UP and DOWN buttons to adjust the price. RESET button to delete all settings. With dual rate mode, you can set two targets at the same time to calculate and compare the electricity costs at different times. Versatile use: simply calculate the energy consumption of devices. Suitable for many electrical appliances, bread machine, coffee machine, computer, game consoles, printer, TV, Hi-Fi, DVD, fan heater, Blu-ray player, oven, etc. Package Includes: 1 * Power Detector Note Please allow 2-3 cm difference due to manual measurement. Besides different computers display colors differently, the color of the actual item may vary slightly from the below images, thanks for your understanding(1 inch = 2.54 cm)