Bluetooth parameters:
Bluetooth version: 5.0
Bluetooth protocol: AGHSP
Bluetooth solution: Blue message
Bluetooth transmission distance: 10 meters
Headphone channel: Stereo (2.0)
Music playback time: maximum sound 7H, medium volume 10 hours
Microphone distance: 1 meter
Bluetooth standby time: 72H
Battery capacity: 180ma/h
Battery power: 0.55W
Horn impedance: 32 ohms
Horn power: 0.02W
Frequency range: 2.4-2.4835GHz
Sensitivity: 45dB
Transmission power: 6dB
Audio output distortion: 0.6%
Audio output signal-to-noise ratio: 93dB
Charging time: 1-2 hours
Maximum input voltage: DC 5V
Maximum input current: 150mah
Maximum input power: 0.55W