Main specifications Laptop IBM ThinkPad R51:
- Processor: Intel Pentium M 1.5 GHz
- Cache: 1 MB
- Bus speed: 400 MHz
- Memory: 256 MB internal, up to 2GB can be added
- Memory Technology: DDR-SDRAM (DDRRAM)
Input Device: Keyboard | Track Stick

Connection:
Audio - Line In (1 / 8 "Mini) | Audio - Line Out (1 / 8" Mini)
Docking Station (proprietary)
Ethernet - RJ45 Twisted-Pair (XBaseT) | Infrared - Wireless IRDA (IrDA-SIR)
Parallel - 25 pin D-shell (IEEE 1284A)
Port Replicator (proprietary)
Serial - RJ11 Modular (Phone / Telco)
USB - Universal Serial Bus 2.0
Video - 15 pin High-Density D-shell (VGA)
Video - 4 pin mini-DIN (S-Video)
Slots: Type III CardBus | Type III PC Card | Wireless LAN
Display: 15 in type Active Matrix LCD (TFT), resolution 1024 x 768 px (XGA)
Video Memory: 32 MB
Video Chipset: ATI Mobility Radeon 7500
Optical drive: DVD / CD-RW
Harddisk: 40 GB

Features:
Ethernet (10/100 Mbps)
Fast Ethernet (100 Mbps)
Wireless Ethernet - 11 Mbps IEEE802.11b
Wireless Ethernet - 54 Mbps IEEE802.11g
AC Adapter
Modem
Power Cord
Speakers
Wireless LAN Antenna
Battery: hold up to 4.7 hours
Software: Microsoft Windows XP Pro
Dimensions: 1.5 in high x 13.1 in long x 10.6 thick in
Weight: 2.26kg
Warranty: 1 year
Price: $ 215 or 2 million (Compuvest.com)