This is a MALE RS232 to TTL signal serial converter cable. The type I cable converts a serial signal to TTL with connections for Tx, Rx, +3V/5V and ground. The TTL connector is a 4-pin Friction Lock with a 0.100" pitch.
This 12 volt solenoid is an insulated continuous switch and is ideal for 12 volt vehicle starters, winches, snow plows or other heavy electric motors. An insulated continuous 12 volt solenoid switch allows for a low input while generating a larger output.