A strap-type touch pen that can be used with smartphones such as the iPhone. With an attachment that can be plugged into the headphone jack (3.5mm stereo mini plug jack), it is easy to put on and take off from your smartphone! Very convenient to carry. Normally, it is a compact size of about 6 cm, and when the main body is stretched, it becomes about 9.5 cm, making it an easy-to-use size. A sponge is used for the tip of the pen, making it responsive and comfortable to use.