Light energy blackboard parameter table product model CHB60PCHB65P external dimensions 1290x1028x28mm1290x1158x28mm writing dimensions 1234x943mm 1234x1073mm film material flexible LCD writing film (anti glare process) flexible LCD writing film (anti glare process) frame material aluminum alloy (fluorocarbon paint process) aluminum alloy (fluorocarbon paint process) erasing method one click erase+local erase one click erase+local erase writing method handwriting/writing pen/moderate hardness item handwriting/writing pen/moderate hardness item battery detachable rechargeable carp battery battery capacity 2600mAh adapter 12V/IA12V/IA product model CHB60PCHB65P external dimensions 1290x1028x28mm1290x1158x28mm Writing size: 1234x943mm, 1234x1073mm Film Material: Flexible LCD Writing Film (Anti Dazzling Process) Flexible LCD Writing Film (Anti Dazzling Process) Frame Material: Aluminum Alloy (Fluorocarbon Paint Process) Aluminum Alloy (Fluorocarbon Paint Process) Erasing Method: One click Erasing+Local Erasing One click Erasing+Local Erasing Writing Method: Handwritten/Writing Pen/Moderate Hardness Item Handwritten/Writing Pen/Moderate Hardness Item Battery Detachable Rechargeable Carp Battery Capacity: 2600mAh2600mAh Adapter: 12V/IA12V/IA