SHARP PN-M401 40" CLASS LED MONITORA standalone signage solution with the flexibility and expandability to support various applications and usage styles. Thanks to its built in SoC (System on a Chip) controller, the 40" Class (39. 5" diagonal) Sharp PN M401 monitor delivers out of the box digital signage solutions even without external devices such as PCs 40" Class (39. 5 diagonal) Screen Size Built in SoC controller with Android OS 4. 4 & Arm Cortex A17 1. 8Ghz quad core processor