- Straps securely and discreetly in palms- When you shake hands with your friends、 they get a?surprising but harmless electric static shock- Powered by 4 x AG3 batteries (included)- Color of the device's casing may vary between shipments                                                                                                                                Dimensions: 1.57 in x 1.46 in x 0.47 in<br />Weight: 0.88 oz