Main Function: Measure and LCD display AC Power Voltage, Current, Active Power, Energy kWh. Backlight control: the backlight can be turned on or off by short press the key Reset energy: long press the key over 3 seconds until the energy data flash, then release the key, short press the key again to reset the energy Data storage: when the power off, the energy data and backlight status can be saved 1. Voltage: measurement range: AC 50-300V, starting test voltage: 50V , accuracy: +/- 1% 2. Current: measurement range: 0-100A , starting test current: 0.02A, accuracy: +/- 1% 3. Active power: measurement range: 0-30kw, starting test power: 0.5w, accuracy: +/- 1% 4. Energy: measurent range: 0-1999kwh, over the test range will maintain the data, otherwise you reset it, accuracy: +/- 1% Dimensions: 78 x 34 x 65 mm Operating Temperature: -20-50C Display Type: Digital Only Model Number: TOGLR Feature: DIN Rail Mounting Energy Meter Frequency: 45-65Hz Product name: Single Phase Electronic KWh Meter color:As shown :plastic Package Contents: 1 x AC Din Rail Multifunctional Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.