I have for sale a AMB Tranx 160 Transponder (Kart Classic) in excellent condition. It’s hard to find transponders like this in this condition. Does not require a subscription, this is a unlimited use transponder.
A brand new Kart Classic transponder retails for $350+ tax, Save $100+.
I am the original owner, never seen rain or dropped on ground, and always kept in cradle when not in use (holds charge longer). Comes in original box with charging cradle with power supply, car adapter power supply (never used), manual, and never used transponder holder and clip.