12 V DC. Quiet operation. Smooth flowing. Self priming. Integrated pressure switch turns pump on and off automatically when spray nozzle is opened and closed. Can be run dry without damage. Low power consumption. Quick disconnect fittings. 3 year warranty. Connection: 3/8" BSP, 1/2" hose and, 1/2" BSP, 3/4" hose or US 3/8" NPT, 1/2" hose and US 1/2" NPT, 3/4" hose. US 1/2" - 14 NPS