Philips M2601A SeriesC Telemetry with SPO2. This telemetry system operates in both the 406-480 MHz and 590-614 MHz ranges. The M2601A and M2601B models function exclusively in the protected Wireless Medical Telemetry Service (WMTS) band (608-614 MHz). You can choose between 3 or 5 ECG options, and SPO2 is available as an additional feature.