BlitzWolf&amp;reg; BW-F4 xBASS Wireless Bluetooth Speaker<br /><br />                                                      BlitzWolf&amp;reg; BW-F4 4000mAh Wireless Blluetooth Speaker<br /><br />Features:1. Long Battery Life:<br />Keep playing for longer with the internal 4000mAh lithium battery. Enjoy 7-10 hours of playing time at 70% volume.<br /><br />2. Wide connectivity: <br />Wirelessly pairs to Bluetooth devices or can be wired to any audio device with an Aux 3.5mm headphone connection.<br /><br />3. High-Fidelity Sound: <br />Crisp， crystal-clear sound and robust bass flow from the BW-F4 through dual 45mm 2*10W speakers.<br /><br />4. Built-in clear Mic:<br />With clear noise isolating microphone， handsfree function seamlessly connects to your phone and offers crystal clear communication.<br /><br />Warm Tips: When you use the charger charge F4 speaker， the charging voltage is not alowed to go beyond DC 5V.Specifications:General Specification  Brand Name  BlitzWolf&amp;reg;  Model  BW-F4  Color Black  Material  ABS+metal+aluminum  Product Weight  676g  Dimensions (cm/ inch) 20.0*6.0*6.4cm/7.87*2.36*2.52inchTechnical Parameters  Connectivity 3.5mm audio jack + Bluetooth connection  Output Power 10W*2  Speaker Unit Diameter 45mm， inner magnetic 4&amp;Omega; 18-core  Batttery Capacity 7.4V/4000mAh  Charging Voltage 5V&amp;plusmn;0.25V  Charging Time 3-4 hours  Working Time 7-10 hours  SNR 80dB  Frequency Response 160Hz-20kHz  Microphone Yes  Bluetooth Version CSR 4.0 Transmission Range 10MPackage  Included: 1 X BlitzWolf&amp;reg; BW-F4 Bluetooth Speaker 1 X USB Charging Cable 1 X 3.5mm AUX audio Cable 1 X English Manual<br /><br />