Specifications
CX 400BT True Wireless | 33
Specifications
CX 400BT True Wireless
Model: CX400TW1, CX400TW1 C, CX400TW1 L, CX400TW1 R
Bluetooth
Wearing style
true wireless stereo earphones
Ear coupling
ear-canal, closed-back
Frequency response
5 Hz to 21 kHz
Transducer principle
dynamic
Transducer size
7 mm
Sound pressure level (SPL)
114 dB (1 kHz/0 dBFS)
THD (1 kHz, 94 dB SPL)
< 0.08 %
Microphone principle
MEMS
Microphone frequency
response
100 Hz to 10 kHz
Microphone pick-up pattern
(speech)
2-mic beamforming array
Power supply
built-in Lithium rechargeable
batteries, 3.7 V
earbuds: 54-60 mAh
charging case: 400-420 mAh
USB charging via USB-C socket of the
charging case: 5 V
, 600 mA
Operating time
7 hrs with rechargeable battery of the
earbud (test conditions: iPhone within
1 m distance, Bluetooth AAC codec,
volume level 50 %, no EQ settings);
20 hrs with rechargeable battery of
the charging case
Charging time of
rechargeable batteries
approx. 1.5 hrs
Temperature range
operation:
0 to +40°C
storage:
–25 to +70°C
Relative humidity
operation:
10 to 80%, non condensing
storage:
10 to 90%
Magnetic field strength
earbuds: 0.63 mT
charging case: 101 mT
Weight
earbuds: approx. 6 g each
charging case: approx. 37 g
Version
Bluetooth 5.1 compatible, class 1, BLE
Transmission frequency
2,402 MHz to 2,480 MHz
Modulation
GFSK,
π
/4 DQPSK, 8DPSK
Profiles
HSP, HFP, AVRCP, A2DP
Output power
10 mW (max)
Codec
aptX®, AAC, SBC
