SUUNTO LUMI - Manual (Page 10)

3 CHANGING STRAP LENGTH
To change the strap length of your Suunto Lumi:
1. Use a pin, paper clip or other pointed tool to release the spring bar from
the buckle. Remove the strap from the buckle and remove the spring
bar from the strap.
2. Twist the measurement paper included in the package around your
wrist so that the strap is comfortable (not too tight or loose). The number
shown in the opening is the sum of lines, along which the straps need
to be cut. For example 9 equals 5 + 4 pieces per strap.
3. Cut the needed amount of pieces along the cutting lines on the under
side of the strap.
4. Insert the spring bars in the last spring holes of each strap. Push the
spring bar into the buckle simultaneously pushing the moving part at
the end so that it slides into place. The spring bar should lock into the
buckle.
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