Educator Model 5V DUAL CHARGER Dual Charger for Models ET-300TS, ET-300TS-L, ET-302TS, ET-302TS-L and ZE-300TS 5 volt charger allows you to charge Educator or Einstein Mini, Lady and Zen remote dog trainers with dual-prong charging port For models ET-300TS, ET-300TS-L, ET-302TS, ET-302TS-L and ZE-300TS Two leads allow simultaneous charging of transmitter and receiver For models listed above containing "TS" in model number ONLY. You can find your model number on the back of your hand control. Note: 2-dog systems require a splitter cable(NOT included) in order to charge both collars plus transmitter at the same time. ONLY fits the older Educator/Einstein models listed above with the dual prong plug(please see photo of plug types)