active power: 0-45000W when the active power between 0 and 9999.9W, the display accuracy is 0.1W Electric energy: 0-9 99999kwh,when the electric power between 0 and 999.99kwh, the display accuracy is 0.01kwh, when between 10000.0-9999.9kwh, the display accuracy is 0.1kwh,when between 10000.0 and 999999kwh, the display accuray is 1kwh. Installation Size: 76 x 39mm Auto-saving: when power off, the electric energy be saved. The saved electric energy Be accumulated continue when the meter power-on next time. Range: AC voltage: AC 80.0-300.0V/200.0-450.0V(You should select the suitable type of meter when your making order) AC current: AC 0-99.99A, minimum resolution is 0.01A AC current: AC 0-40.00A, minimum resolution is 0.01A power frequency: 45.0Hz-65.0Hz power factor : 0.00-1.00PF Colour:black Material:ABS+ electronic components Size:79 x 43 x 48mm Package Contents: 3 x meter 3 x CT 3 x Instruction manual 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.