Highlights: Speaker power: 4O 4W*2 Signal to noise ratio: =85dB Frequency response range: 150 ~ 20KHZ Audio interface: 3.5mm stereo headphone plug Built-in 1800MA lithium battery, very convenient to charge Charging time: 3 to 5 hours Play time: Fully charged intermediate volume 5-8 hours Power adapter requirements: input voltage: 220V output voltage: 5V current 1A/2A Product size: 230*55*10MM Product Description: Dual speakers, anytime KTV, no need for cable, mobile phone Bluetooth link can be karaoke Support TF card breakpoint memory playback HIFI sound quality, plug and listen, can control songs Aluminium alloy body, fine surface treatment,