Tech Specs:

• Main Processor: 8-bit Z80 CMOS
• Processor Speed: 4.19MHz
• Resolution: 160 x 144 pixels
• Colors on screen: 4 (Greyscale)
• Sprite Size: 8x16 or 8x8
• Screen Size: 2.6 Inches
• Audio: 4 Channel
• RAM: 8KB

Additional Notes:

Very Common check regarding the screen however as age has made the glue holding the screen cable to the motherboard come away.