Shinwa Delta Max Δmax 9900 Accurate 2.0 Charger/Discharger

Charge/Discharge Monitor, Δmax 9900 Ver. 2.0

- Model: Δmax 9900
- Version: Ver. 2.0
- Function: Charge/Discharge Monitor
- Connection Terminal: Battery Connection Terminal
- Display: Monitor Display
- Operation Buttons: Program Select, Mode Select, Start/Stop Button

Thank you for looking.
I received this from an acquaintance and kept it in storage, but since I don't use it, I'm putting it up for sale.
Charging and discharging have been confirmed.
No instruction manual. The small connection port on the right side of the main unit is unconfirmed due to lack of knowledge, so please consider it junk.
As this is a used item, please refrain from purchasing if you are concerned about minor details or are sensitive.