Compatible with the Toshiba DKT3000 Series Phones: DKT3001 - DKT3007 - DKT3010 - DKT3020 - DKT3201 - DKT3210 - DKT3220 - Also compatible with Toshiba IPT2000 Series Phones: IPT1020-SD - IPT2008-SDL - IPT2010-SD - IPT2020-SD - IPT2110 - IPT2120