4 Buttons 315 MHZ Wireless RF Remote Control Controller for Car Alarm Frequency: 315MHZ (150kHz(max)) Size: 57x34x12(mm) Operating Current: 10mA@12V. Transmitting Power:10mW@12V.Sensitivity: -108dBm Modulation mode: ASK(AM). Encoding type: Learning. Transfers distance: 80m (100-200m to the max for open spaces)