Sound Level: 26.2 dBAMachine Dimensions: 7.4 in L x 3.7 in W x 3.7 in HMachine Weight: 1.09Machine Warranty: 3 YearsCompatibility:The Transcend 3 is designed to work explicitly with Transcend batteries and should not be used with other devices. The one exception to this rule is the Portable Outlet, as it takes stored DC power and converts it to outlet power, which won't damage the machine. Voltage Requirements:Power Supply:100-240VAC, 50-60Hz Power Cord Length: 6 feetDefault Machine Settings: 4-20cm H2OHumidification Type: N/AExhalation Relief: YesRamp Mode: YesMax Altitude: 8000DC Capable: YesBattery Option: YesCompliance Data: YesAuto Altitude Adjustment: YesGood For:Veteran Users FAA Compliant: YesProduct Warnings:WARNINGSOnly use the USB port on the Transcend 3 with a computer. Attempting to use other devices with the USB port can result in damage or loss for both devices.Exercise caution if the room temperature is greater than 90°F, as this can cause the device to overheat.Only use the Transcend batteries with the Transcend 3. These batteries are designed to work in an optimized fashion with the Transcend 3 and will give the best performance. It is also possible to use a universal battery such as the Portable Outlet with the Transcend 3.Do not attempt to sterilize the entire machine with a CPAP cleaner or sanitizer such as the Lumin, as this can result in damage or loss.Do not cover or use in bed, as this can lead to the device overheating, leading to damage or loss of the device.