Check the listing for details. ~NEWEST VERSION~ MRT Transponder, works with mylaps RC3.0 RC4.0 through V4.4. Condition: New. Listed at 76.90 USD. Newest Version We are an authorized MRT dealer. Perfect with all AMBrc systems and RC4 up to v4.4 Works great with mylaps. The Stormer team use the MRT transponders ourselves. So you know they're good! Pop them in all your favorite cars. Associated, Xray, Losi, CRC, Serpent, you name it! MRT Transponder, mPTX-ID 100% waterproof These transponders from MRT are lightweight and small in size. This makes them easy to fit into the smallest, tightest areas. Size: 19 x 16 x 6mm Weight: 4 grams The PTX ID number of each transponder can be changed to an alternative ID number. Each individually numbered transponder has its 'custom' ID number written on the supplied instruction sheet with the an alternative number also available. PTX transponders are supplied with 2 stored ID numbers and come factory set on the custom ID. It is possible to switch from the custom number to the other number if required. To use the PTX it should be connected to a power socket on a receiver or to a battery pack. The LED will light up to show the transponder is operating. When setting the number (or checking the number that is set) the LED will flash to show the number selected, or the number that has been set. Operating Voltage: 2.1V - 16V DC Lead Length: about 190mm from Stormer Hobbies Mounting: Standard 3 Hole (same as AMB/MyLaps) Compatibility: AMBrc2, AMBrc3 and RC4.0 up to V4.4 systems. New in the package as shown below.