Bluetooth speaker feature: Streamline cylindrical shape designs, small, simple, logo area arrangement Output: 2w Bluetooth standard: v3.0 Speaker: 36mm Built-in battery: 3.7v 300mah Input voltage: dc 5v Charging time: 2 to 3 hours Playing time : up to 5 hours Bluetooth profiles supported: a2dp, hfp, hsp Impedance for speaker: Thd:1% (1khz/1w) Snr: >80db Frequency response:180hz to 18khz Reception distance: 10m Material: abs, rubber oil plated Dimension: 44(x53(h)mm