**Bluetooth version：V3.0 Portable, hanging portable design
**Bluetooth transmission power: CLASS2 4dBm **Bluetooth wireless audio transmission
**Bluetooth working frequency：2.4GHz Ariety *of classic color for choice
**Charging voltage: DC5V/500mA With phone handsfree
**Working voltage ：DC 3.7V Computer small speakers
**Battery capacity:600MA Car bluetooth
**Music playing time：4H Card speakers
Talking time:8H Waterproof speaker
THD: ≤ 0.1%
Signal to Noise Ratio：≥90 db
Speaker parameter :4Ω3W ф40MM
Bluetooth range :10-20m