What you need
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Using tweezers carefully poke out the spring bars holding the watch bands in place
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Using a PH00 driver unscrew the 4 screws holing the caseback on
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also using a PH00 driver unscrew the 2 screws holding the battery down
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Using tweezers bridge the gap separating two connectors resetting the watch
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To reassemble your device, follow these instructions in reverse order.