Pen cap can be used even if the product is not Function: Draw, write, note, contact Clip for carrying on the tablet case Pure copper pen tip with protective film on the tip, not to hurt the screen Compatible use for: Android phones, phones, various of tablet capacitive screen devices Effective distance: 1.6mm from the pen Working time: 8-10 hours Standard accessories: USB charger Battery specification: 0.518w 3.7v 140mah Product weight:26 g Light introduction: press the button , the LED blue light is on, to use; press the button again, shut down, LED light off; LED red light is on when charging, LED light is off when the battery is fully , or LED light is on colour:White Material:metal size:1.45 x 8.9 x 145mm Package Contents: 1 x pen 1 x Mirco-USB charging cable 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.