Description Do you need a professional wireless presenter pen? Please look at our product, it is very durable and practical for its premium material. Can be a good helper while you are presenting your report or other things on computer. It can bring great convenience to you. Features -Color: Black -Material: ABS -Size: Approx. 12.80X2.00X1.00cm / 5.03X0.79X0.39in - Adopted special chip, operation is more , performance is more stable - With built-in rechargeable battery, it will normally last two weeks with a full charge - Great presenter pen is for professors, business, lecturers, teachers, students. - Equipped with a cloth storage bag, convenient to store this presenter pen - No need to install software, very easy to use. Specification -Transmission Frequency: 2.4GHz -Remote Control Distance: 100m -Output Power: -Working Voltage: 3.7V -Sleeping Current: -Battery: Lithium polymer battery -Light wavelength: 650 ( ) -Light Type: IIIA Type Light -Light Distance: >200m Adopted special chip, operation is more , performance is more stable With built-in rechargeable battery, it will normally last two weeks with a full charge​ Great presenter pen​ is for professors, business, lecturers, teachers, students. Equipped with a cloth storage bag, convenient to store this presenter pen​ No need to install software, very easy to use.