The Whistler XTR-185 is a rechargeable cordless radar detector. It is equipped with a solar panel which assists in charging the battery (estimated 17 hour battery life). In case the solar panel isn't enough, the XTR-185 has a built-in charger, which lets you charge the batteries by plugging into a normal 12 volt plug. The Whistler XTR-185 will detect POP mode radar and it supports 3 city modes to help eliminate false alerts. The icon display is bright and easy to read, and can be dimmed or turned off entirely. The XTR-185 is also equipped with a selectable auto shut off feature, which can prevent dead batteries.