The Archer Field PC works great in harsh environments by being able to withstand an amazing amount of immersion, shock, humidity, and extreme temperature. This ultra-rugged field PC is a great tool for explorers and archaeologists and runs on an XScale 520MHz processor and the Windows Mobile 5.0 OS. Communicate wirelessly via Bluetooth, Wi-Fi, or cellular modems. After charging the Archer Field PC once your good for about 20 hours. If you want to expand memory there are Sealed CF and SDIO card slots available.