Bluetooth 5.1 connection, faster transmission, lower power consumption, stronger anti-interference capability, simple connection, and free playbackElegant design with vintage button, light luxury retro style, enhances home decor with a fresh look, blending aesthetics into your audio experienceMetal diaphragm, explosive auditory feastBuilt-in 2000mAh high-capacity polymer lithium battery, extending playback time up to 6 hoursStereo acoustics, wider and farther sound range, outstanding HI-FI sound quality, 48mm full-range unit structure Specifications: Bluetooth version: V5.1Effective distance: 10 metersOutput power: 8WFrequency response range: 120Hz-18kHzSignal-to-noise ratio: 80dBSpeaker size: 2"Battery capacity: 7.4V 2000mAhUsage time: 4-6 hoursCharging time: 2-3 hoursCasing material: ABSDimensions: 220*80*138mmProduct weight: 890g