Features: 8 principal functions: current, timing, electric energy, voltage, power, temperature, energy factor, frequency PVC flame retardant material, all-round buckle design, secure installation, flame retardant and safer Full-view coloration display screen for clearer commentary Dedicated metering chip The calculation data is simple, convenient and immediate Wide differ of purposes Power saving and worry-free rational use of electricity Package Included: As proven in the photograph of the selected genre Instructions: 1 Press and preserve the M key for three seconds to go into the settings, double-click the M key to wrap, and click the M key to shift 2 Alarm prompt setting, when the worth is set, press the M key for three seconds to avoid wasting The alarm immediate will seem only when the actual examine value is bigger than or equivalent to the set value or more than or equivalent to the set price When the software has an alarm, it'll make a legitimate At an identical time, the numerical unit will flash on the display For example, if the present is determined to 1, an alarm will appear, and a immediate will seem when the actual latest used is larger than 1 Turn off the alarm immediate method: set the alarm cost bigger than the actual cost or set all alarm values to zero Electric calories and timing reset method: press the up button for three seconds and the timing flashes, click on the M button to clean the timing, double-click the M button to wrap to the electrical energy, and click on the M button to clean Restoring factory settings: Press and maintain the down key, and then activate the flexibility and listen to the sound of the meter, indicating that the restoration is profitable The factory default voltage alarm cost is 275V, others are zero Model: AC301-20A Model: AC301-100A Diversion method: integrated Diversion method: exterior Voltage: AC 50-300V Voltage: AC 50-300V Current: 0-20A Current: 0-100A Electric energy: zero Electric energy: zero Power: 0-4 Power: 0-22KW Timing: 0 Timing: zero Temperature: -20~150 ° C Temperature: -20~150 ℃ Frequency: 50-60Hz Frequency: 50-60Hz Power factor: 0 Power factor: zero