Splitter cable for charging multiple Dogtra components at once for models: 202NCP (S/N less than 101961), 1802NC (S/N less than 100101), 1803NC (S/N less than 100101), 1804NC (S/N less than 100126), EF-3000 additional receivers (not eF-3000 Gold.) Need to purchase the primary splitter of 5-3 to expand off of.