Portable Dual Stereo Bluetooth Earphone Speaker Two-in-one

Product information:
Power type: USB
Color: black, silver gray, red, blue, dark green
Frequency range: 100HZ-20KHZ
Rated Voltage: 3.7
Additional functions: card insertion, voice prompt, and call function
Applicable scenarios: fitness, outdoor, mobile/Portable
Rated Power: 5
Bluetooth specification: V5.3
Wireless transmission range: 10m
Audio Noise ratio: ≥ 95db
Battery capacity: 40mAh
Built-in voltage: 3.7V
Playback Time: About 3H
Speaker specification: 52MM
Speaker Power: 4Ω/5W
Frequency response: 120Hz-18KHz
Charging input: 5V/500MA
Stand-alone size: L93 * W42 * H91mm