TI-Nspire CX Navigator - A completely wireless classroom network communication system of either TI-Nspire CX handhelds that maximizes popular graphing technology and increases the teacher?s ability to engage and assess student performance. Only compatible with the TI-Nspire CX, TI-Nspire CX CAS, TI-Nspire CX II and TI-Nspire CX II CAS Handhelds