Each speaker cube has its own long-lived Lithium-Ion battery pack, delivering up to 10 hours of music between charges. Evolve even charges wirelessly: to charge the batteries, just place the speaker on its charging station. There's nothing to plug in, and nothing to unplug when you're ready to deploy the music. Each speaker features its own on/off switch, and an automatic sleep mode to conserve battery charge. 

Specifications

• General 
  Product Type   Wireless speaker system with iPod dock  
  
• Power 
  Power Device   Power adapter  
  Run Time (Up To)   10 hour(s)  
  
• Battery 
  Type   Speaker battery - rechargeable - Lithium Ion  
  
• Connections 
  Connector Type   1 x audio input  
  
• Speaker System
  Connectivity Technology   Wireless  
  Audio Amplifier   Integrated  
  Speaker Type   Active   
   
  

Technical:

Dimensions:

    * 15.7" (400mm) wide x 5.1" (140mm) deep.
    * 4.7" (120mm) tall w/o speakers in place
    * Total height 7.5" (190mm) w/ speakers in place.

Outputs:

    * Composite Video Out, S-Video Out (5th gen iPod Only)
    * Right/Left Audio Out (female RCA connectors)

Inputs:

    * iPod universal Dock insert accommodate all iPod models with dock connectors.
    * Right/left Auxiliary Audio in - female RCA connectors.

Power:

    * AC Power: 100-240V AC, 12V/5A
    * Battery: 3.7v/5.2Ah

Operating Range:

    * Operating temperature: 32° to ~104° F (0° to ~40° C)
    * Nonoperating/Storage temperature: -4° to 104° F (-20° to 40° C)
    * Relative humidity: 5% to 95% noncondensing
    * Maximum operating altitude: 10,000 feet (3000 m)

Speakers:

    * Effective range: 150' (45.7m) from Base Unit
    * Dimensions (ea.): 5.1" X 5.1" X 5.1" (140mm x 140mm x 140mm)
    * Self-contained RF module.
    * Broadcast Transmission latency ("wireless delay") < 20ms
    * Internal lithium-ion battery, rechargeable- 3.7v/5.2Ah with overcharge/undercharge protection.
    * Hours of operation at normal listening volume: 10 hours.
    * Built-In Amplifier Power: 12 Watts (RMS)
    * Frequency Response: 120Hz - 20kHz

Remote:

    * 4.01" (102mm) long x 1.64" (42mm) wide x 3.9" (10mm) thick.
    * Range: 150' (45.7m)
    * RF-transmits to 150' (45.7m) @ 433 Mhz.
    * Functions: Play/Pause, Volume Up/Volume Down, Next/Fast Forward, Previous/Fast Rewind, Shuffle, Repeat, EQ, System Power
    * Power: Button cell type CR2032 3V Lithium battery.

Compatibility:

Evolve is Made for iPod, and is a Made for iPod licensed product. However, the system is designed to allow play from just about any sound component.

    *  Integrates with: CD, MP3 players, MiniDisc players, TV's, stereo receivers equipped with Aux Audio inputs.