Bluetooth speaker features: Exclusive design with patent, ce, fcc, rohs, logo area arrangement Bluetooth speaker parameters: Output: 2.5w Bluetooth standard: v3.0 Speaker: 40mm Built-in battery: 3.7v 400mah Input voltage: dc 5v Charging time: 2 to 3 hours Playing time : up to 5 hours Impedance for speaker: 4 Thd:(1khz/1w) Snr: >80db Frequency response: 160hz to 18khz Reception distance10m Material: abs, rubber oil plated Dimension: 48(l) x 48(w) x 71(h)mm
