Alesis HR-16 Drum Machine

With (photocopied) manual 
Comes in the original Alesis box 
Bought in the late 80s, home use only

Is missing the Volume slider (top right). Control is operational, I use a small pointed implement to adjust(replacement sliders are available on ebay for £5.90) 

Replaced the lithium battery 4 or 5 years ago 
All in working order