Package Information: You will receive 2 LED Rotary Pens that are nifty designed, convenient to hold, easy to operate and use. The amount is enough to make your use and replacement easy Quality: The rotating pen is made of non-slip, wear-resistant and pressure-resistant materials that are and easy to grip. In order to achieve a good balance performance, we have developed metal pin heads on both sides of the pen that easier to turn Ingenious design: the two ends of the rotating pen are weighted to achieve the golden point of balance and improve flexibility of use. Developed with a non-drip pen cap to increase durability; LED light shows gradual change, the color is very dazzling and charming Battery Mounting : Each rotary flash pen comes with 4 sets of button batteries (12 total) and 2 spare lamp caps. You don't have to worry about the lack of battery power. The battery assembly is easy. Simply turn the top switch counterclockwise to remove the batteries and insert the new batteries in the same direction as the previous batteries Usage function: the pivot pen can exercise the flexibility of fingers, help you the pressures of work and life. In addition, replacing gradients can bring you a happier mood and make life more fun Features: Color: black + blue Material: Plastic + Silicone Use: Open: loosen the top switch counter-clockwise, take out the insulation film and tighten it. Off: Turn off the light by releasing the switch on the head. Replace the battery: turn the top switch counterclockwise, take out the batteries and replace them with new batteries. Beautiful gift choice: The twist pen is very suitable for students and office staff. Playing with the twist pen can relieve pressure and adjust the mood. It is a nice gift for students and office staff. Size: . 21 cm / 8.27 inches. Package Contents: 2 x Rotating Pen Note: The product does not contain the refill, can not write as an ordinary writing pen. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.