This item is not directly purchasable online.
Upgrade to RC4 Transponder: $54.99 + shipping
Upgrade to RC4 Pro Transponder: $54.99 + shipping
Upgrade to Hybrid Transponder: $101.25 + shipping
Upgrade any R/C transponder, of any brand (MyLaps, AMB, MRT, etc), working or not (even if it has no wires), to a MyLaps RC4 transponder.
Please call or e-mail us if you have any questions.