Gambridge Z88

I have the main unit and power adapter (uk).

type computer
country UK
year 1988
os BBC Basic
cpu   Zilog Z80
speed 3.28 MHz
ram 32 KB
rom 128 KB
graphic 640 x 64 mono LCD
colors 3 shades of gray
sound piipper
ports serial I/O
power 4 x AA battery