Specifications:

◆ Supports various smart phones of IOS  and Android systems.

◆ Signal-to-noise ratio: ≥85dB

◆ Frequency range: 150 ～ 20KHZ

◆ Audio source interface: 3.5mm stereo headphone plug

◆ Charging time: 3 ~ 5 hours

◆ Play time: about 3 hours when fully charged

◆ Power adapter requirements: input voltage: 220V output voltage: 5V current 1A / 2A