6" x 8" Interwrite Pad SP400 Bluetooth v2.0 Wireless Graphics Tablet w/Cordless Pen & Bluetooth USB Adapter Interwrite Pad SP400 Bluetooth v2.0 Wireless Graphics Tablet General Features: Silver color 6 x 8-inch active area Built-in Bluetooth v2.0 Class 1 module Patented digitizer and pen input technology 4,000 lines per inch resolution Use with any projected image to create an interactive whiteboard Up to seven Interwrite Pads can used in one classroom