Welch Allyn RETeval-DR Directions For Use Manual page 16

12 Controls and connectors
No. Feature
4 Power indicator
5 Power button
6 Thumb joystick
7 Eyecup
8 Bezel
9 Sensor strip lead connector
10 Battery cover
Description
When the light is steady, it indicates that the device is powered
on. When it is blinking, it indicates that the device is in the
process of shutting down.
Push button to turn the device on and off
Allows you to move through menus, perform functions, and select
parameters by moving the joystick up/down/right/left/select
Blocks ambient light during testing
Area to which the eyecup attaches
Connects the RETeval-DR device to the sensor strip
Covers the battery compartment
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Welch Allyn RETeval-DR