No.	Attribute	Description
1	Usability - ease of use	Easy for CHWs to use the device, i.e. can apply it appropriately e.g. attach the probe correctly, switch on the device, select the correct settings, complete the assessment to get a SpO2 result
2	High level of decision support	Allows the community health worker to detect the symptoms of severe illness without the need for decision making from them
3	Automation of diagnosis	Automatically provides the CHW with a diagnosis of severe illness
4	High accuracy of measured/calculated result	The pulse oximeter consistently provides an accurate measure of the SpO2
5	No or little literacy and numeracy required	The device only requires a very low level of literacy and/or numeracy to be operated by the CHW
6	No or little training required	The CHW only requires minimal amounts of training to be able to use the device effectively to detect the symptoms of severe illness
7	No or little familiarity with technology required	The CHW does not need any prior familiarity with technology to operate the device effectively to detect the symptoms of severe illness
8	Long operational life in the field – e.g. more than two years	The device (not probes) will have an operational life while being used by CHWs of more than 2 years
9	Does not require charging (solar, battery, grid)	The device does not require charging to be used by CHWs to detect the symptoms of severe illness
10	Does not require replaceable parts (non-rechargeable batteries, consumables)	The device does not require replaceable parts such as non-rechargeable batteries and/or consumables throughout its functional life in the field
11	Requires little or no maintenance	The device does not require any maintenance throughout its operational life when used by CHWs to effectively detect the symptoms of severe illness
12	High durability/mechanical robustness	The device will not break during normal use by the CHW in the detection of the symptoms of severe illness
13	High CHW confidence in measurements	The readings provided by the device support the CHW in relation to detecting the symptoms of severe illness
14	High caregiver acceptability of diagnosis	The readings provided by the device help and support the caregiver/parent in accepting the diagnosis offered by the CHW
15	High patient comfort	The device does not cause hurt or discomfort to the patient while being used by the CHW in the detection of the symptoms of severe illness
16	High portability	The device is easy to carry by the CHW during normal working
17	Easy to maintain hygiene	The device is hygienic and easy to maintain in this regard – i.e. doesn't require specialist cleaning procedures or products
18	Low price (less than $50)	The annualized device cost is less than $50 (Device = total package of device plus consumables such as batteries/probes and chargers)
19	High level of safety	The device provides a high level of safety when it is being used for the detection of the symptoms of severe illness
20.	Multi-functional (includes a minimum of RR and Pulse oximeter)	The device incorporates several applications for the detection and classification of the symptoms of severe illness