Speakers - Universal - Retro Radio Boardonf Bluetooth Outdoor Portable Speaker Subwoofer Dual Speakers Subwoofer FM Radio TF Card Aux U Disk Music | Bookshelf Speakers (Dark Wood) Highlights Universal Retro Radio Boardonf Bluetooth Outdoor Portable Speaker Subwoofer Dual Speakers Subwoofer FM Radio TF Card Aux U Disk Music | Bookshelf Speakers (Dark Wood) Retro Radio Boardonf Bluetooth Speaker Portable Outdoor Subwoofer Dual Speakers Subwoofer FM Radio TF Card Aux U Disk Music | Bookshelf speakers (dark wood) Features: Bluetooth version: Bluetooth 4.0 Operating distance: up to 10m (free space) Frequency response: 100hz-18kHz Signal and noise ratio (SNR): 70DB Distortion rate of output: 1% Speaker: 3W*2.4 TF card: Support up to 32GB Battery capacity: built-in 3.7V 2000MAH lithium battery (18650) Music time: about 5 hours (depends on the volume level) Charging port: micro USB Color: dark wood Item size: approx. 16.2 * 10.3 * 10.0cm / 6.37 * 4.05 * 3.93in Item weight: approx. 742g / 26.16oz Package size : approx.20.4 * 15.0 * 14.2cm / 8.03 * 5.90 * 5.59in Package weight: approx.915g / 32.24Oz