Aquatec pump model # 5853-2LM2-B534 voltage 24VAC. Pump is 3”x 4” x 7”, 6 lbs. Inlet/outlet are 3/8” quick-connect fitting for 3/8" OD tubing. Internal bypass set at 130 psi, adjustable. Heavy-duty baseplate with damper. It is better to put the pump on the floor. 1 year manufacturer warranty. Made in USA. Transformer (Power supply adapter) AC to AC. Input 110 to 115V AC to 24V AC 2.5 Amp, USA plug. Cord length 4 feet. For misting, aeroponics, hydroponics, 3/8” line pressure boosting applications, the pump can siphon water from a container or from tap water. Self-priming, but pump need to be placed on the floor below water level. * Operating pressure 100 psi at specific output flow rate. Bypass pressure setting at 130 psi. Open flow rate 4L / min. Larger than 8852 pump 2.5L/min Number of applicable nozzles depends on combined flow rate of nozzles and input pressure. * 3/8” quick connect inlet/outlet. Do not use 1/4” tubing, use 3/8” OD tubing * Pump is 24V AC current. Transformer is 2.5 amp 110VAC to 24VAC with quick plug. *Pressure switch not included. Purchase separately. Aquatec pressure switch 40, 60,80,100 psi, 1/4” or 3/8” are available depending on applications. * For RO systems applications, for classic RO systems only. * This pump will not work for tankless RO systems, please don't' try. The pump will not turn off by itself. You may need to manually turn on/off the electricity to the pump every time you need to use water. * If you have a non-working RO system, please don't use booster pump. Booster pump is not able to fix a non-working RO system. It will not work, please fix your RO system first. If you have standard (classic) RO system with two RO membranes or large RO membrane 200 GPD to 400 GPD, and your water supply pressure is under 50 psi, then this pump will work for you. But you need to purchase pressure switch and solenoid valve separately to make RO system operate automatically. If your RO system is small residential under-the-sink type, under 100 GPD, use Aquatec 6840-2J03-B224 pump For 100 GPD to 200 GPD RO systems use Aquatec 8852-2J03-B424 pump This pump has 3/8” JG quick connect inlet/outlet with quick plug-in wires, Heavy duty 2.5 Amp 24V AC to AC transformer for regular 110V USA outlet This kit does not come with pressure switch. The pressure switch would sense the pressure in the output line, so when the output line is shut off or the storage tank is full the pump would shut off, and when you start using water and tank pressure drops then the pump turns back on to replenish the tank. This kit does not come with the optional (ESO) Electronic-Shut-Off solenoid valve, so it would rely on your existing mechanical auto-shut-off valve in your RO system to turn on/off the water supply. To convert your RO system to fully electronic shut off, you need to add solenoid valve and pressure switch to turn on/off the water and the pump.