Welch Allyn SureSight Vision Screener - User Manual - Manual (Page 6)

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Do not attempt to connect the positive and negative battery terminals
to each other, nor to any other device.
“Caution” - use of controls or adjustments or performance of
procedures other than those specified herein may result in hazardous
radiation exposure.
Product contains two internal apertures within the laser tube
assembly. These are not user replaceable or user adjustable. DO NOT
attempt to make any aperture adjustments to this product.
Do not operate, charge, leave or discard battery pack in any
environment where it may exceed 0°C to 40°C.
Do not immerse the battery pack in water.
Do not attempt to open or pierce the battery pack.
Do not strike or throw the battery pack.
Do not use a battery pack which appears to be deformed, leaking,
corroded, or is otherwise irregular.
If electrolyte leaking from battery contacts your skin or eyes, rinse
with running water and immediately seek medical attention.
IPXØ: Not protected against the ingress of water.
Not for use in the presence of flammable anesthetics.
Type BF Equipment.
Double Insulated.