Wow! Compared to the rubbish DIGITEN Solenoid valves, the difference is like night and day. The BACOENG ball valves are sturdily built, and they do the job. You don't need to worry about if your valve is open or closed, as it will do so regardless of if there is any line pressure (an issue with the DIGITENs). The quality metal components of the BACOENGs also give you peace of mind about interfacing them with full-pressure water lines (unlike the flimsy plastic housing of the DIGITENs). The only thing to watch out for-- as others in the comments have mentioned-- is that you must limit the current. I chose to use a power supply with a limited current rather than use a resistor for the sake of efficiency. Just know that they won't function if the current is too high. The first power supply I used had too much current, but fortunately it didn't damage anything: it just wouldn't turn on. Switching to the lower-current supply did the trick. Another thing: you CAN use these with a relay board (to interface with a Raspberry Pi or Arduino) despite the three wires. I highly recommend these for any project!

excellent for marine applications .. put it inline with the existing manual valve on the thru hulls ... a spdt relay with the electric cooling water pump is awesome!!!!!

Works great! Will remain in either open or closed position indefinitely; only uses power while changing position. Looks to be well made; time will tell. Opening in the ball is closer to the ID of a 1/2 pex crimp fitting than a 1/2 pipe ID so there may be some flow restriction. Very attractive price.

Very happy with this valve. It is working great and I now can do plumbing jobs without going outside to shut off the main water line. Most of the gears inside are plastic, with the exception of one or two. Hopefully they will last a long time, but if there is a failure I have used compression fittings so I can easily replace the whole unit. I was able to modify a zwave device to operate it on 12VDC and 3d printed a case for it. I will provide updates if I have any issues.

BACOENG 3/4" Stainless Steel NPT 2 Port DC12V Three Wire Control Motorized Ball Valve
I have purchased several and they work fine. There is a motor direction switching relay built in. The relay is always operated when the "open" direction (red wire) is energized. Here are the 12v dc currents I read:
Closed to Open, moving "“ red wire energized - 45 mA.
Open end of travel, static "“ red wire energized - 20 mA. Motor disconnected and just the relay drawing current.
Open to closed, moving "“ blue wire energized "“ 25 mA.
Closed end of travel, static - blue wire energized "“ 0 mA. Motor disconnected
Notice that the open port on this valve is small. A ¾" full flow ball valve would have a port diameter of 19.05 mm. The information, "Brass Orifice Size: 15mm, Reduced Bore Actuator" is placed prominently in the product details, so it shouldn't be a surprise.