Bluetooth 5.1 connection, faster transmission, lower power consumption, stronger anti-interference capability, simple connection, and free playback Elegant design with vintage button, light luxury retro style, enhances home decor with a fresh look, blending aesthetics into your audio experience Metal diaphragm, explosive auditory feast Built-in 2000mAh high-capacity polymer lithium battery, extending playback time up to 6 hours Stereo acoustics, wider and farther sound range, outstanding HI-FI sound quality, 48mm full-range unit structure Specifications: Bluetooth version: V5.1 Effective distance: 10 meters Output power: 8W Frequency response range: 120Hz-18kHz Signal-to-noise ratio: 80dB Speaker size: 2" Battery capacity: 7.4V 2000mAh Usage time: 4-6 hours Charging time: 2-3 hours Casing material: ABS Dimensions: 220*80*138mm Product weight: 890g