Sennheiser Set SET 820 Instruction Manual page 23

Technical data
Modulation
Carrier frequencies
AF frequency response
S/N ratio
Transmitter
RF output power
Audio input
Microphone socket
Charging time for battery
Charging time (spare battery)
Power supply
Weight
Dimensions
Receiver
Max. sound pressure level
Power supply
Operating time
Weight
Dimensions
FM, stereo
see type plate at the base of the transmitter
40 Hz ....... 15 kHz
60 dB A rms
typ. up to 10 mV
3.5 mm jack, stereo/mono
2.5 mm jack, mono
approx. 4 h
approx. 10-12 h
12 V DC via NT 820 mains unit
approx. 94 g (without battery)
diameter: 3.8 inch, heigth: 1.1 inch
> 125 dB
2.4 V via BA 151 battery
more than 4 hours per battery
approx. 60 g (without battery)
length: 9.0 inch, width: 4.9 inch, heigth: 1.0 inch
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