California Solar Accessories- Solar Powered Bluetooth Cellphone Car Speakerphone Kit With DSP Noise Cancelling Technology California Solar Accessories- Solar Powered Bluetooth Cellphone Car Speakerphone With DSP Noise Cancelling Technology Solar charged, no need to plug in! Loudest speaker on the market Best microphone with DSP noise cancelling technology Easy to use operation, Full 1 Year warranty, 100% satisfaction guarantee