Use and Care Manual
SAFETY HC-2210/2810
10 X7702248100
© 09/19 ECHO Incorporated
Repetitive Stress Injuries (RSI)
It is believed that overusing the muscles and tendons of the fingers, hands, 
arms, and shoulders may cause soreness, swelling, numbness, weakness, 
and extreme pain in those areas. Certain repetitive hand activities may put 
you at a high risk for developing a Repetitive Stress Injury (RSI). An extreme 
RSI condition is Carpal Tunnel Syndrome (CTS), which could occur when 
your wrist swells and squeezes a vital nerve that runs through the area. 
Some believe that prolonged exposure to vibration may contribute to CTS. 
CTS can cause severe pain for months or even years.
To reduce the risk of RSI/CTS, do 
the following: 
• Avoid using your wrist in a bent, 
extended, or twisted position. 
Instead try to maintain a straight 
wrist position. Also, when 
grasping, use your whole hand, 
not just the thumb and index 
finger.
• Take periodic breaks to minimize 
repetition and rest your hands.
• Reduce the speed and force with 
which you do the repetitive 
movement.
• Do exercises to strengthen the hand and arm muscles.
• Immediately stop using all power equipment and consult a doctor if you 
feel tingling, numbness, or pain in the fingers, hands, wrists, or arms. The 
sooner RSI/CTS is diagnosed, the more likely permanent nerve and 
muscle damage can be prevented.
All over head electrical conductors and communications wires 
can have electricity flow with high voltages. This unit is not 
insulated against electrical current. Never touch wires directly 
or indirectly, otherwise serious injury or death may result.










