An infinitely powered Bluetooth headset may sounds like fantasy, but fantasy just turned to reality with the Iqua 603 Sun. Powered by a solar panel that can charge the unit using any available indoor or outdoor light, it allows you to have virtually infinite standby time. The reviewer stated that even after two weeks, the Iqua 603 Sun never needed any charging through its AC adapter. The reviewer found pairing the 603 sun quite easy. Calls made indoors were extremely clear and without echo. However, because Iqua doesn’t claim to have any noise-canceling technology, calls made outside had noises such as the wind and street noise. Also, the 603 Sun doesn’t support switching between two paired Bluetooth devices. For a long-lasting headset with decent audio quality and an almost infinite standby time, the reviewer found the Iqua 603 Sun well worth the price.