This intelligent power monitor adopts integrated special-purpose chip. It is good instability and high in precision. It displays voltage effective value, current effective value, active power, accumulated electric quantity, grid frequency and power factor in full screen, and can be widely used in civil and industrial fields. Features: Energy 5-digits, 0.01~99999KWH. Compatible frequency 50/60HZ. Can be connected with the test of eletrical power, voltage, current and so on. Backlight control, short press to turn on/off backlight. Clear energy reading, press and hold down the key to clear the reading of kWh. Specifications: Model: P06S-100 Name: 6 in 1 Voltage Meter Max. Power: 22000W Rated Power: 22000W Standby Power: 1W Max. Current: 100A Rated Power: 100A Voltage: 110~250V Voltage Accuracy: 1% Current Accuracy: 2% Power Accuracy: 2% Size: Approx. 90 x 55 x 26mm / 3.54 x 2.16 x 1.02inch Inner diameter of CT: Approx. 12.68mm / 0.5inch Quantity: 1pc Weight: 106g Instructions of Button: 1. Click button to turn on or off background light. 2.Hold the button for 3 seconds to get overload power. 2.1 Go to the page of setting overload power(factory default is 4.4KW). 2.2 Flicker at highest position; click once to add 1; hold the button for 2 seconds for displacement; the maximum set value is 99.9KW. 2.3No operation on the button for 5 seconds, it will exit and save data. 3.Hold the button for 5 seconds, the system will reset, accumulated electric quantity is cleared, and the overload power is reset to default. Instructions of Product: 1.Six major functions are displayed in full screen; background light flickers for warning overload power. When the current power is smaller than overload power, it will stop alarm. 2.P06S-20 and P06S-100 are different products, which cannot be used in the same way! Because they adopt different internal principles and designed in different structures. You should use the correct wiring method corresponding to the product. The damage of the product, caused by wrong wiring, will not be covered in warranty! 3.Model P06S-100 product must be connected with an external mutual inductor in normal operation. Threading must follow the arrow of the mutual inductor! No power and power factor after operating indicates wrong wiring. Please refer to the wiring diagram! Cautions: 1.The sum of load power of the electric appliance connected with the product should not exceed rated power, or the product will be damaged, even resulting in fires. 2.The product doesn't have waterproof function, so please use it under dry environment. Prevent splash water when using it near a bathroom, a kitchen, a fishbowl, etc. Keep it away from children and fire; do not plug any foreign matter rather than a wire in the connection hole; please fasten the screw. 3.Do not disassemble the product without permission. Package Included: 1 x Voltage Meter 1 x Mutual Inductor (Other iems in the picture are NOT included)