Slim, rechargeable S320WI and S500WI Projector Pen from Dell allows you to write, draw, or apply it as a mouse on virtually all software applications and smooth surfaces. Designed to deliver not just interactivity but off-surface interactivity of up to 9m (29.5 feet), the Dell S320WI and S500WI projector pen will allow you the freedom to move off the board and yet remain interactive. Embedded with a Li-ion battery, this slim and rechargeable interactive pen comes with 3-button functionality that puts swift control into the palm of your hand. Cleverly designed for the Dell S320WI and S500WI, this interactive pen sports a sleek design and functions as a mouse, a drawing tool, or a writing assistant at your command. Use this pen in concert with the Dell S320WI and S500WI and its interactive projection software and enjoy both on- and off-surface (up to 9m) interactivity. Comes with a wrist strap which you can loop to the bottom-end slot of the handy device to avoid drop and damage of pen. You can now inject fun into mundane lessons, help promote active learning, and spark renewed interest in the learning journey.