此旋鈕 #22 是 Dogtra 原廠替換零件，專為 T&B 雙發射器設計。採用黑綠配色，可直接安裝於相容的 Dogtra 遙控器，協助您在訓練過程中維持精準控制。
The black and green color combo matches my transmitter perfectly, and it snapped on without any wobble or play. It's a genuine replacement part so I know it'll hold up longer than the cheap knockoff I tried before.
My old knob had worn smooth and kept slipping mid-session, which was frustrating. This one clicks on with a solid, reassuring fit and the black/green finish matches the transmitter perfectly. It's a simple fix that makes the transmitter feel brand new again.
The green and black color combo actually looks sharp against the transmitter, and the fit is snug enough that I don't worry about it slipping mid-session. Took me less than a minute to swap the old one out, so the direct compatibility really saves a headache.