Intermec CK31. Display diagonal: 88.9 mm (3.5 "), Display resolution: 240 x 320 pixels, Display: TFT. Internal memory: 64 MB, Flash memory: 64 MB, Compatible memory cards: SD. Processor clock speed: 400 MHz, Processor family: Intel PXA, Built-in processor: PXA255. Networking features: WLAN, WPAN. Wireless LAN type: 802.11b/g, Security algorithms supported: 64-bit WEP, 128-bit WEP, 256-bit WEP, WPA