Znen - Lintex 4 pin Large Recifier regulator
This 4 pin Chinese Scooter rectifier regulator is known to be found in Znen, Lance and Lingyu(lintex) produced scooters. Wiring Colors going into it (in a clockwise fashion) are Black, Brown, Green and Yellow. See second picture for wire color orientation.
Size is 1 1/4" x 2 1/4" x 1"
