Specifications

MOMENTUM True Wireless 4

Model: MTW4, MTW4 R, MTW4 L, MTW4 C

Wearing style

True Wireless stereo earbuds

Ear coupling

ear-canal

Frequency response

5 Hz to 21 kHz

Transducer principle

dynamic

Transducer size

7 mm

Sound pressure level (SPL)

107 dB (1 kHz/1 mW)

THD (1 kHz, 94 dB SPL)

< 0.08 % (1 kHz/94 dB)

Noise cancellation

Hybrid Adaptive ANC technology

Microphone principle

MEMS

Microphone frequency response

100 Hz to 10 kHz

Microphone pick-up pattern (speech and ANC)

3 microphones per earbud

beamforming array for active noise cancellation

Power supply

built-in lithium rechargeable batteries:

earbuds (R and L):
3.66 V DC-Symbol, 75 mAh, 0.28 Wh or
3.8 V DC-Symbol, 72 mAh, 0.274 Wh

charging case:
3.6 V DC-Symbol, 820 mAh, 2.952 Wh

input:

earbuds (R and L):
5 VDC-Symbol, max. 100 mA

charging case: 5 V DC-Symbol, max. 1000 mA

output:

earbuds (R and L): none

charging case:
5 V DC-Symbol, max. 100 mA x 2 (R and L)

Charging method via charging case

USB charging via USB-C socket:
5 V DC-Symbol, 1000 mA max;

Qi wireless charging

Operating time

7.5 hrs with rechargeable battery of the earbud (ANC activated)

7 hrs with rechargeable battery of the earbud (ANC deactivated)

30 hrs with rechargeable battery of the charging case

(test conditions: iPhone, volume at 50 %)

Charging time of rechargeable batteries

approx. 1.5 hours for full charge

approx. 8 minutes for 1 hour of music playback

(ambient temperatures < 15 °C or > 30 °C and Qi wireless charging increase the charging time)

Temperature range

operation: 0 to +40 °C

charging: +5 to +35 °C

storage: –20 to +60 °C

Relative humidity

operation: 25 to 75 %, non condensing

storage: 10 to 90 %

Magnetic field strength

earbuds: 0.95 mT

charging case: 105 mT

Ingress protection of the earbuds

splash proof (IP54)

Weight

earbuds: approx. 6 g each

charging case: approx. 66 g

both earbuds and charging case: approx. 78 g

Bluetooth

Version

Bluetooth 5.4 certified, class 1

Transmission frequency

Classic BDR/EDR and BLE 1M:
2,402 MHz to 2,480 MHz

BLE 2M: 2,404 MHz to 2,478 MHz (without 2,426 MHz)

Modulation

GFSK, π/4 DQPSK, 8DPSK

Profiles

AVRCP, A2DP, HFP, TMAP, PBP

Output power

10 mW (max)

Codec

aptX™, aptX™ Adaptive/Lossless, AAC, SBC, Auracast™ Broadcast Audio, LC3

Device name

MOMENTUM TW 4

Number of active connections

2