User's Manual

10 FAQs
1. Check whether the speaker is paired or try to restart the speaker
2. Check whether the vehicle is powered on or try restart the vehicle
3. Are there any other applicable vehicles around? If yes, please turn them o.
4. Check whether the Bluetooth of the vehicle is connected
1. Check the volume and adjust to the appropriate value
2. In case of low battery voltage, please charge the battery
1. Is the vehicle out of the eective connection distance of the speaker
2. There is obstacle between the speaker and the vehicle.
1. Is the battery low?
2. Charge the speaker and turn it on
Contact the ocial after-sales service for support.
Product name
Product model
Dimensions (length × width × height)
Net weight
IP rating
Button functions
Charging port
Dimensions
Material
Specifications
Power
Bluetooth protocol
Bluetooth version
Frequency
Working distance
Number of channels
Output power (Max)
Rated power
Frequency range
Signal to noise ratio
Rated capacity
Play time
Charging voltage
Charging time
Storage environment
Operating environment
Ninebot Engine Speaker
BT2928
248 × 83 × 77 mm
715g
IP55
Power on/o, volume +, volume -, next, mode switching.
USB Type-C
50 × 50mm
NdFeB
20-core double magnetic trumpet
8W × 4
HFPV1.6 HSPV1.2 A2DPV1.2 AVRCPV1.4 DIV1.3
V 4.2 and above
2.4GHz-2.48GHz
Approx. 10 meters
Double channel
8W × 4
5W × 4
100Hz ~ 20KHz
> 80dB（2W）
2200mAh (7.4V）
2~3h
5V, 3A
2.5h
-10~60℃
-10~50℃
9 Specifications
Product
Problems and Issues Problems and Issues
Basic information
Horn
Bluetooth specification
Audio specification
Battery specification
Ambient temperature
6
Connection and pairing failure for
multiple times
Low volume or distorted sound
Interrupted music
The speaker indicator is not on
The speaker indicator is not on