178 degree wide viewing angle, color LCD screen, very clear. Electricity usage monitor: Monitor is the of the high-cost energy appliance, helping you lower power consumption and save money. Auto Store & Memory Function: when power off, the electric energy data will be stored and memorized, can be reset. Type: External CT Make wiring easier Parameters: ac power meter voltage measuring range is AC 40-300V current measuring range is 0-100A active power range is 0-450000W electric energy range is 0-99999kWh Frequence:45.0Hz-65.0Hz Power Factor:0.00-1.00PF Colour: as shown Material: plastic Package Contents: 1 * Watt-hour meter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.