Sennheiser HDE 2020-D Instruction Manual page 21

The operating controls
6
6
6
20
LED lights up red:
The built-in rechargeable battery is being charged.
LED lights up green:
The built-in rechargeable battery is fully charged. The
receiver is now ready for operation.
LED slowly flashes red:
The temperature of the built-in rechargeable battery
is outside the permissible range (3°C to 40°C). The
charging process is interrupted until the temperature
is again within the admissible range.
LED lights up yellow/orange:
The built-in rechargeable battery is defective. Please
contact your Sennheiser partner.
Volume display
The volume display
current volume level.
Channel display
The channel display
currently selected channel.
Battery status display
The 4-step battery status display
mation on the capacity of the receiver's built-in
rechargeable battery.
Shortly before the rechargeable battery is completely
discharged, the display backlighting flashes, indicat-
ing that the receiver will soon switch off automati-
cally.
provides information on the
provides information on the
provides infor-