Bluetrek Speaky In-Car Speakerphone - Black [Retail Packaging] Powerful battery provides up to 6 hours of talk time or up to 38 days of standby use Universal USB car charger and charging cable included VoIP compatibleuse Speaky with your computer or VoIP apps like Skype or Facetime Superior sound quality with NoiseLock noise cancellation and 2-watt speaker Speakys friendly voice prompts keep you informed of its status (on/off, connected, low battery, etc.)