Sennheiser audioport A 200 Notice D'emploi page 24

Specifications
BA 151 rechargeable battery
NT12-5TW plug-in power supply unit (country-specific, EU or US)
Nominal input voltage/
nominal input current
Power frequency
Nominal output voltage
Nominal output current
Temperature range
Relative air humidity
(non-condensing)
10 | A 200
nickel metal hydride: 2.4 V, 80 mAh
100 – 240 V~/
200 mA
~ 50 – 60 Hz
12 V
max. 500 mA
operation: 0 °C to +40 °C
storage: -20 °C to +60 °C
operation: 20 to 85 %
storage: 10 to 95 %