Operating Temperature -10~60℃:Designed for versatility, it functions reliably in a wide range of temperatures from -10 to 60℃. Voltage Measurement Range AC 40-300V:Versatile voltage measurement range of AC 40-300V, suitable for various electrical systems. / Voltage Measurement Range AC 250-450V:Versatile voltage measurement range of AC 250-450V, suitable for various electrical systems. DIY Supplies Electrical:Ideal for electrical DIY enthusiasts, this energy meter simplifies monitoring of power consumption. Display Type Digital Only:Features a clear digital display, making it easy to read and interpret energy usage data. D52 Power Meter|D52 Energy Meter|Accuracy Class 1% ±2 words:Boasts an exceptional accuracy of 1% ±2 words, ensuring precise readings for your energy usage. Specification: A: AC40-300 built-in CT / B: AC40-300 external CT / C: AC250-450 external CT / D: AC250-450 built-in CT Color: As Shown Material: plastic Package Contents: 1 * Energy 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.