Black 5mm female and two black 5mm male connectors. Works with the following Dogtra Dog Training Collars:
175NCP (Serial Number greater than 103471)
200NCP (Serial Number greater than 111361)
202NCP (Serial Number greater than 101961)
1800NC (Serial Number greater than 100121)
1802NC (Serial Number greater than 100101)
1803NC (Serial Number greater than 100101)
1804NC (Serial Number greater than 100126)
300 Series
1000 Series
1100NC
1200 Series
1500 Series
1600 Series
1700 Series
1900 Series
2300 Series
2500TandB Series
3500 Series
7000 Series
7100 Series
2000 Series
2000TandB Series
2200 Series
200NC