Veho VSS-003W-X1 MIMI X1 2.4 GHz Wireless Speaker System with PC/Mac USB Transmitter True 2.4 Ghz Wi-Fi speaker with 130 feet range paired with supplied dongle (dependent on environment) Rechargeable lithium ion battery giving 8 hours play time, recharged via USB Compatible with MIMI X-3. Pair infinite speakers with dongle to stream music throughout your house Windows and Mac Compatible, suitable for use with iPod/iPhone/MP3 and smartphone apps 5 watts power output, internal bass deflector for volume & clarity