Under voltage protection 80V-210V (adjustable) (default: 175V);Over voltage proteciton 120V-300V (adjustable) (default: 275);Over current protection 1A-63A (adjustable) (default: 63A) Reconnect time (delay on time): 10s-90s (default: 30s) Over Current and Leakage Reconnect Times 1-30/Off(adjustable)(default:5) This function can be turned off Temperature Protection 10-85°C(adjustable) (this parameter only set on App) Energy Consumption Record Range:10-500kWh(default: 30kWh) Hign-Concerned Chemical:None Output Voltage:Ac220v Measuring Energy Range:0-99999.9 Kw/H Phase:Single Phase Max Operating Current:50a - 79a Display Type:Digital Only Diy Supplies:Electrical Working Temperature:-30℃-70℃ Humidity Storage Temperature:50% At Less than 40℃ (No Condensation) Power Display Range:0-99999.9kw/H Backlight Time:Issued In About 15 Seconds The product appearance and printed words may vary depending on the batch, but this does not affect use. Colour:As Shown Material:Plastic Package Contents: 1 * TUYA Smart Relay Device 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.