PROMETHEAN ACTIVPEN4T3 {TEACHER ACTIVPEN50} - TEN PACK for Activboards 100/378/378pro,500pro.
Model ActivPen 50
Works with Promethean ActivBoard Range (100, 300, and 300 Pro)
Connectivity Wireless, battery-free
Dimensions 167mm x 20mm x 23mm (6.57 in x .79 in x .91)
Weight 25g (0.9oz)