![background image](http://html.mh-extra.com/html/sennheiser/cx-120-bt/cx-120-bt_instruction-manual_1240204021.webp)
Specifications
CX 120BT | 21
Specifications
Model: CX 120BT
Bluetooth
Wearing style
Bluetooth® neckband cable
Ear coupling
ear-canal
Frequency response
17 Hz to 21,000 Hz
Transducer principle
dynamic
Transducer size
10 mm
Sound pressure level (SPL)
112 dB (1 kHz/0 dBFS)
THD (1 kHz, 100 dB)
< 0.5 %
Microphone principle
MEMS
Microphone frequency
response
100 Hz to 8,000 Hz
Microphone sensitivity
(as
per ITU-T P.79)
-42 dB V/Pa
Microphone pick-up pattern
(speech audio)
omni-directional
Power supply
built-in rechargeable lithium-polymer
battery: 3.7 V
⎓
, 100 mAh;
USB charging: 5 V
⎓
, 500 mA max.
Operating time
up to 6 hours (A2DP)
8.5 hours (HFP)
Charging time of
rechargeable batteries
approx. 1.5 hrs
Temperature range
operation: 0 °C to +40 °C
storage: –25 °C to +70 °C
Magnetic field strength
3.6 mT
Weight
approx. 14 g
Version
4.2, class 1
Transmission frequency
2,402 MHz to 2,480 MHz
Modulation
GFSK,
π
/4 DQPSK
Profiles
HFP, AVRCP, A2DP
Output power
10 mW (max)
Codec
SBC, aptX, aptX LL