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No Sound
Make sure the music volume is at audible level on both your
device and BX 840 TWS.
Make sure your device is successfully paired with the
BX 840 TWS, the LED indicator turns solid blue.
Poor sound quality
Move the device closer to the BX 840 TWS or remove any
obstacle between the device and the BX 840 TWS.
TECHNICAL SPECIFICATIONS
Bluetooth Version 5.0
Bluetooth frequency band 2402-2480 MHz
Bluetooth maximum
radio-frequency power
< 10 dBm
Bluetooth proles
supported:
A2DPV1.2; AVRCPV1.4, GAVDPV1.2;
AVDTPV1.2; SPPV1.2; AVCTPV1.2
Wireless work distance: 10 m
Rated Power: 2 x 30 W
Driver Unit: ø 31 mm, 8Ω,15W x 2
ø 70 mm, 4Ω, 35W x 2
Frequency response: 60 Hz - 20 kHz
Signal-to-noise ratio: ≥80dB
Battery: Lithium-ion 7.2 V / 5000 mAh
(4 x 3.7 V / 2500 mAh)
DC input voltage/current: Type-C USB 5V/0.5A-2A
Playtime: 3-10 hours (varies by volume level and content)
Battery charge time: approx. 5-6 hours
Dimensions: 372 x 193 x 166 mm
Weight: 3.7 kg
Working temperature: Temperature: 0º C ~ 40º C
Humidity: 0% ~ 85% RH
Storage temperature: Temperature: -30º C ~ 60º C
Humidity: 0% ~ 90% RH
7


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