This product is either discontinued or we cannot get that from suppliers.
Poly Plantronics 80090-01, Maximum Output Current 500 mA, Input Voltage 110 V AC, 220 V AC, Output Voltage 9 V DC, Frequency 50 Hz, 60 Hz.
Poly Plantronics Ac Adapter 120v Rt. Angle Cs50/55/cs70/cs351/voy 510/ Ca12cd - Au Adapter (80090-01).