1: bluetooth version: V3.0 + LDR
2: bluetooth transmission distance: 10 meters, with a bluetooth phone / hands-free
3: frequency response range: 100 hz - 20 KHZ
4: signal-to-noise ratio: 84 db or higher
5: sensitivity: 80 db + 2 db:
6: the output power: 3 w * 1
7: distortion rate of 1% or less
8: the speaker specification: 4 Ω 3 w Φ 45 mm
9: input power supply: dc DC5V600MAH
10: working voltage: 3.0 to 5.5 V
11: playing time/charging time: 320Min / 120Min
12: standard parts: MIN - USB charging line
13: interface: support TF card, audio input,
