Reprap 3D Printer Smart Adapter Controller Ramps 1.4 LCD Display 4×20

HM-T series FSK transmission moduleFEATURESHIGHLY INTEGRATED, SMALL SIZEHIGH SENSITIVITY, LOW POWER CONSUMPTIONFSK TECHNOLOGY, SUITABLE FOR REPLACING ASK MODULESLESS INTERFRENCE, LONGER

HM-TRP Series 100mWTransceiver modulesFeatures
 Low cost, high performance , high reliability
 FSK modulation, 2-way half –duplex communication, strong anti-interfere
 433/470/868/915MHz