Specifications82* 1 Letter size is for U.S.A. and Canada models.• The markers (big) and the eraser are used for other than the interactive function.• The markers for interactive (small) are used while inserted in the pen holder.The Electronic Pen [a marker for interactive (small) inserted in the pen holder] and the Electronic Eraser are usedwith the interactive function.InteractiveFunctionEffective Area(Height x Width) Projector mode: 850 x 1,330 mm (2' 915/ 32" × 4' 43 /8" )* The position cannot be detected within 50 mm (2”) of theupper screen border.Whiteboard mode: 825 x 1,330 mm (2' 8 15 /32" × 4' 4 3/8" )* The whiteboard cannot not be written on within 50 mm(2" ) of the upper screen border and 25 mm (1" ) of thelower screen border.* It is not always possible to normally detect the positionwithin 100 mm (3 15/ 16" ) of the position receiver and35 mm (1 3 /8" ) from the both sides of the screen.Battery for Electronic Pen orElectronic Eraser LR03 (AAA size) x 2*Alkaline batteryBattery Longevity for Electronic Penor Electronic Eraser 48 hours [Continuously at 25°C (77 °F)]* When using Panasonic “LR03 (AAA size)” alkaline batteries.Optional and Separately Available ItemsOption Stand: KX-BP065Wall-mounting kit: KX-B063SeparatelyAvailableItemsReplacement film: UG-6001 (Set of 2 rolls [50 m (164' )])Markers (big): KX-B031 (set of 10 black markers),KX-B032 (set of 10 red markers),KX-B033 (set of 10 blue markers)Erasers: KX-B042 (set of 6 erasers)Marker (big) and eraser set: KX-B035 (contains one black, one red, and one blue markers andone eraser)For Interactive Pen holder:Electronic Eraser:Marker (small) set:Eraser cloth(for Electronic Eraser):KX-BP038KX-BP048KX-BP0385 (contains one black, one red, oneblue and one green markers)KX-BP0481 (set of 10 cloths)