That charger does not have any discharge functions. Odd to sell a high end charger with no discharge
Looks like they (Integy) might be pushing this unit to go with their new Digital-90 discharger.
The Digital-90 looks like a cross between a Zero-30 & DPD, but according to the add in Xtreme 10/06 issue, it can do up to 90A discharge
No pics on Integy site - part #E2090 - page 23 in Xtreme.