Specifically designed for emergency & disaster preparedness, the KA350 Voyager Trek offers different methods to power itself. Those methods include AC/DC adapter (optional), three AAA batteries (not included) and the built-in rechargeable Ni-MH battery which can be charged from the AC adapter, by hand cranking, by solar panel or even by a PC. The solar panel not only can keep the built-in battery fully charged but also provides power for the radio even when no battery is installed. With its revolutionary design and versatile functions, it's an ideal companion for emergency preparedness purposes, outdoor activities as well as traveling. Similar to its sister product KA500, the KA350's rechargeable batteries are replaceable, extra battery packs are available for purchasing on Kaito's website. At the heart of the KA350, there is an internal generator that recharges the internal Ni-MH battery pack and powers the radio & the flashlight. On the side of the radio, there's a USB jack for charging your cell phones, MP3 players and other gadgets. You can use the KA350 to receive a wide range of broadcasting including AM, FM, shortwave and NOAA weather stations. The 7-weather channels are pre-programmed and numbered from 1-7, you can easily and conveniently tune into the stations by adjusting the switch, no more guess work involved. Accessories include earphones, user manual & warranty registration card.