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The Chewing Gum Shocking Function can be only used several or dozen times. This is determined by the battery voltage . and it may fail after strong crush or high drop.

There are 4x LR44 batteries in the Shock Pen, and they can be replaced. But need to break Chewing Gum sticker according to the picture 2.

If Shock Pen's shocking function is weak or fail . Please click 'Problem with order'->'Other issue' to contact us. We will solve all your problem perfectly.

Note: Please use it to shock somebody carefully. Maybe They will drop it. And It easy to broken.