Sennheiser Set 830-TV Instruction Manual page 32

Specifications
NT 13 mains unit
Nominal input voltage
Mains frequency
Max. power consumption 2.4 W (incl. battery charging)
Nominal output voltage 13.5 V DC
Nominal output current 500 mA
Standby consumption
Ambient temperature
The devices comply with the following standards:
Europe
USA
Canada IC
28
100 V~ to 240 V ~
50–60 Hz
approx. 0.9 W
(w/o battery charging)
+5°C to +40°C
EMC: EN 55013, EN 55020
Safety: EN 60065, EN 61558, EN 60950
47CFR15_B
ICES-003