Imedical Healthcare Solutions
The SleepSense Alice 4 Electret Snore Sensor is a small and very sensitive electret (capacitive) snore microphone powered by the Alice 4 System. SleepSense snore microphones exhibit a wide and flat frequency response while providing you with durability and a quality signal output. 
Warranty: 6 Month - Free of Defects in Materials and Quality Workmanship.
Compatibility: The SleepSense Alice 4 Electret Snore Sensor is completely compatible with the Philips Respironics Alice 4 unit.
NOTE: SleepSense items are for professional use only, and are for sale by or on the order of a physician only.