The Philips M4814A Intellivue is a lightweight, pocket sized telemetry transmitter with integrated ECG & SPO2 monitoring. Every model provides bidirectional communication with the Philips IntelliVue 1.4 gig clinical network. The M4841A Telemetry has a strong plastic case, and very reliable electronics. All telemetry units are capable of 3, 5, and EASI ECG Monitoring. The unit comes with user interface buttons for nurse call and battery level indicator. We have found most failures due to physical and liquid damage. These units move around a lot in the hospital making them more prone to physical damage.