Charging rubber cap #T3, for Dogtra transmitters: ST100, ST200, BL905, D500, D502, D500P, D502P, RRS, RRD, T&B, and T&L. For Dogtra receivers: RRS and RRD. *Sold individually*
The seal on this cap is snug enough that I don't worry about dust getting into the charging port anymore. Took two seconds to pop it on my ST100 and it hasn't budged since.
That little rubber cap fits my Dogtra transmitter perfectly and seals tight over the charging port, so I don't worry about dust or moisture getting in. It's a simple replacement but exactly what I needed, and it arrived quickly.
My old cap cracked after years of use, and this #3 fits the transmitter snugly so the charging pins stay protected. Glad I could find a replacement without buying a whole new unit.