Features:1) Material of pipes: PE or PP 2) Welding diameters: 20mm to 355mm 3) Memory capacity: 500 4) Power supply: 170 - 250V, 50Hz 5) Welding output voltage: 20 - 40V 6) Protection degree: IP54 7) External temp) reading probe precision: ±0.5°C 8) Dimensions: 250 x 320 x 180mm