**parameter Sell points
**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:4000MA Car bluetooth
**Music playing time：15H FM radio
**Talking time:40H Card speakers
**THD: ≤ 0.1% POWER BANK
**Signal to Noise Ratio：≥90 db Waterproof **speaker
**Speaker parameter :4Ω3W ф36MM `
**Bluetooth range :10-20m